PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX geof: <http://www.opengis.net/def/function/geosparql/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND( geof:latitude ( ?coord ) AS ?lat ) .
  FILTER ( ?lat > 47.8 )
}

Using entities:
- Switzerland (wd:Q39), also known as Confoederatio Helvetica, Swiss, Swiss Confederation: is instance of federation / is instance of state / is instance of country / is instance of landlocked country / is instance of sovereign state / is instance of confederation / country in Central Europe / country in Central Europe / country in Europe / federal republic in Western Europe

Using properties:
- country (wd:P17 as wdt), also known as host country, land, sovereign state, state, P17: is subproperty of located in the administrative territorial entity / sovereign state that this item is in (not to be used for human beings) / sovereign state that this item is in (not to be used for human beings) / sovereign state that this item is in (not to be used for human beings) / sovereign state that this item is in (not to be used for human beings)
- coordinate location (wd:P625 as wdt), also known as co-ordinate location, co-ordinates, coordinates, co-ords, coords, etc.: coordinates of the subject / coordinates of the subject / geocoordinates of the subject. For Earth, please note that only WGS84 coordinating system is supported at the moment

Answer: {"name": "answer", "arguments": {"kg": "wikidata", "sparql": "ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geof:latitude(?coord) AS ?lat) . FILTER(?lat > 47.8) }", "answer": "Yes"}}

{"name": "answer", "arguments": {"kg": "wikidata", "sparql": "ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geof:latitude(?coord) AS ?lat) . FILTER(?lat > 47.8) }", "answer": "Yes"}}

SPARQL query over wikidata:
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX geof: <http://www.opengis.net/def/function/geosparql/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND( geof:latitude ( ?coord ) AS ?lat ) .
  FILTER ( ?lat > 47.8 )
}

Using entities:
- Switzerland (wd:Q39), also known as Confoederatio Helvetica, Swiss, Swiss Confederation: is instance of federation / is instance of state / is instance of country / is instance of landlocked country / is instance of sovereign state / is instance of confederation / country in Central Europe / country in Central Europe / country in Europe / federal republic in Western Europe

Using properties:
- country (wd:P17 as wdt), also known as host country, land, sovereign state, state, P17: is subproperty of located in the administrative territorial entity / sovereign state that this item is in (not to be used for human beings) / sovereign state that this item is in (not to be used for human beings) / sovereign state that this item is in (not to be used for human beings) / sovereign state that this item is in (not to be used for human beings)
- coordinate location (wd:P625 as wdt), also known as co-ordinate location, co-ordinates, coordinates, co-ords, coords, etc.: coordinates of the subject / coordinates of the subject / geocoordinates of the subject. For Earth, please note that only WGS84 coordinating system is supported at the moment

Execution result:
True

[System]
You are a question answering assistant. Your job is to generate a SPARQL query to answer a given user question.

You should follow a step-by-step approach to generate the SPARQL query:
1. Determine possible entities and properties implied by the user question.
2. Search for the entities and properties in the knowledge graphs. Where applicable, constrain the searches with already identified entities and properties.
3. Gradually build up the SPARQL query using the identified entities and properties. Start with simple queries and add more complexity as needed. Execute intermediate queries to get feedback and to verify your assumptions. You may need to refine or rethink your current plan based on the query results and go back to step 2 if needed, possibly multiple times.
4. Use the answer or cancel function to finalize your answer and stop the generation process.

Available knowledge graphs:
- wikidata at http://localhost:7001 with prefix index for entities and similarity index for properties

Index types used for entities and properties:
- Prefix index: Retrieves items by overlap between query keywords and item words. The query keywords can match item words exactly or as prefixes.
- Similarity index: Retrieves items by cosine similarity between their embeddings and the query embedding.

SPARQL prefixes for use in function calls:
- bd: <http://www.bigdata.com/rdf#
- cc: <http://creativecommons.org/ns#
- data: <https://www.wikidata.org/wiki/Special:EntityData/
- dc: <http://purl.org/dc/elements/1.1/
- dct: <http://purl.org/dc/terms/
- foaf: <http://xmlns.com/foaf/0.1/
- geo: <http://www.opengis.net/ont/geosparql#
- geof: <http://www.opengis.net/def/function/geosparql/
- gn: <http://www.geonames.org/ontology#
- hint: <http://www.bigdata.com/queryHints#
- imdb: <https://www.imdb.com/
- math: <http://www.w3.org/2005/xpath-functions/math#
- ontolex: <http://www.w3.org/ns/lemon/ontolex#
- owl: <http://www.w3.org/2002/07/owl#
- p: <http://www.wikidata.org/prop/
- pq: <http://www.wikidata.org/prop/qualifier/
- pqn: <http://www.wikidata.org/prop/qualifier/value-normalized/
- pqv: <http://www.wikidata.org/prop/qualifier/value/
- pr: <http://www.wikidata.org/prop/reference/
- prn: <http://www.wikidata.org/prop/reference/value-normalized/
- prov: <http://www.w3.org/ns/prov#
- prv: <http://www.wikidata.org/prop/reference/value/
- ps: <http://www.wikidata.org/prop/statement/
- psn: <http://www.wikidata.org/prop/statement/value-normalized/
- psv: <http://www.wikidata.org/prop/statement/value/
- qb: <http://purl.org/linked-data/cube#
- qfn: <http://qlever.cs.uni-freiburg.de/function#
- ql: <http://qlever.cs.uni-freiburg.de/builtin-functions/
- qlss: <https://qlever.cs.uni-freiburg.de/spatialSearch/
- rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
- rdfs: <http://www.w3.org/2000/01/rdf-schema#
- ref: <http://www.wikidata.org/reference/
- s: <http://www.wikidata.org/entity/statement/
- schema: <http://schema.org/
- skos: <http://www.w3.org/2004/02/skos/core#
- v: <http://www.wikidata.org/value/
- void: <http://rdfs.org/ns/void#
- wd: <http://www.wikidata.org/entity/
- wdno: <http://www.wikidata.org/prop/novalue/
- wdt: <http://www.wikidata.org/prop/direct/
- wdtn: <http://www.wikidata.org/prop/direct-normalized/
- wikibase: <http://wikiba.se/ontology#
- xsd: <http://www.w3.org/2001/XMLSchema#

Additional rules to follow:
- Explain your thought process before and after each step and function call.
- Do not just use or make up entity or property identifiers without verifying their existence in the knowledge graphs first.
- Do not ask the user for clarifications without first attempting to complete the task. If the task input is incomplete or ambiguous, try to make reasonable assumptions and document them.
- Do not use "SERVICE wikibase:label { bd:serviceParam wikibase:language ..." in SPARQL queries. It is not SPARQL standard and unsupported by the used QLever SPARQL endpoints. Use rdfs:label or similar properties to get labels instead.
- Always execute your final SPARQL query before giving an answer to make sure it returns the expected results.
- The SPARQL query should always return the actual identifiers / IRIs of the items in its result. It additionally may return labels or other human-readable information, but they are optional and should be put within optional clauses unless explicitly requested by the user.
- Do not stop early if there are still obvious improvements to be made to the SPARQL query. For example, keep refining your SPARQL query if its result contains irrelevant items or is missing items you expected.
- Do not perform additional computation (e.g. filtering, sorting, calculations) on the result of the SPARQL query to determine the answer. All computation should be done solely within SPARQL.
- For questions with a "True" or "False" answer the SPARQL query should be an ASK query.

[User] Does Switzerland have a place north of the Point (8.57 47.8)?

[Assistant]
Okay, let's see. The user is asking if Switzerland has a place north of the point (8.57, 47.8). Wait, coordinates are usually latitude and longitude. But wait, in standard notation, latitude comes first, then longitude. So 47.8 is latitude, 8.57 is longitude? Wait, no. Wait, the point is given as (8.57 47.8). Hmm, maybe the user wrote longitude first then latitude? Because usually, in coordinates, it's latitude then longitude. But sometimes people might mix them up. Let me check.

Wait, the coordinates for Switzerland: the country's coordinates are roughly between 45.8°N to 47.8°N latitude and 5.9°E to 10.5°E longitude. So the point given is (8.57, 47.8). If that's (longitude, latitude), then latitude is 47.8°N, longitude 8.57°E. But if it's (latitude, longitude), then latitude 8.57°N which is way south, but that doesn't make sense for Switzerland. So probably the user wrote longitude first, then latitude. So the point is 8.57°E longitude and 47.8°N latitude. But wait, the standard is latitude first, then longitude. So maybe the user made a mistake in the order. Let me check.

For example, the coordinates of Zurich are approximately 47.3769° N, 8.5417° E. So latitude 47.3769, longitude 8.5417. So if the point is (8.57, 47.8), that would be longitude 8.57, latitude 47.8. But in standard notation, it's latitude first. So maybe the user wrote longitude first by mistake. But regardless, the question is whether Switzerland has a place north of this point. Wait, "north of the point" – so the latitude of the place must be higher than the latitude of the point. Because north means higher latitude (in the northern hemisphere).

Wait, the point is (8.57, 47.8). If the coordinates are (longitude, latitude), then latitude is 47.8. So north of that would be latitude >47.8. But Switzerland's northernmost point is around 47.8°N? Let me check. Switzerland's northernmost point is near Schaffhausen, which is at about 47.8°N. Wait, actually, the northernmost point of Switzerland is at 47°48'30"N, which is 47.8083°N. So latitude 47.8083. So the point given is 47.8, which is approximately the northernmost point. So if the point is (longitude 8.57, latitude 47.8), then north of that would be latitude higher than 47.8. But Switzerland's northernmost point is about 47.8083, which is just a bit north of 47.8. So maybe there is a place in Switzerland north of that point.

But the user's question is "Does Switzerland have a place north of the Point (8.57 47.8)?" So we need to check if there's any location in Switzerland with latitude greater than 47.8 (assuming the point's latitude is 47.8). But first, we need to confirm the coordinates order. Let's assume that the point is given as (longitude, latitude), which is common in some contexts, but usually it's latitude then longitude. However, the user wrote "Point (8.57 47.8)" – perhaps they meant longitude 8.57 and latitude 47.8. But in standard coordinates, it's latitude first. So maybe the user made a mistake. Alternatively, maybe they wrote it as (longitude, latitude). Let's check.

For example, the coordinates for the point (8.57, 47.8) in the order longitude then latitude would be 8.57°E, 47.8°N. But if it's latitude then longitude, then 8.57°N, 47.8°E – but that's in Africa, which doesn't make sense for Switzerland. So the user probably meant longitude 8.57, latitude 47.8. So the latitude is 47.8°N. So north of that would be latitude >47.8°N.

Now, Switzerland's northernmost point is at approximately 47.8083°N (47°48'30"N), which is 47.8083. So 47.8083 is greater than 47.8, so yes, there is a place north of that point. But we need to confirm this via Wikidata.

So the task is to find if there exists any location in Switzerland with latitude greater than 47.8. But how to model this in SPARQL.

First, we need to find all places in Switzerland (country is Q39), and check their coordinates. But Switzerland's administrative divisions might have various places. However, the question is about any place in Switzerland, so perhaps the northernmost point of the country.

Alternatively, perhaps the user is referring to a specific point, but the question is whether there's any place in Switzerland north of that coordinate. So we need to check if there's any location in Switzerland with latitude >47.8.

But first, we need to get the coordinates of places in Switzerland. In Wikidata, locations have coordinates using the property wdt:P625 (coordinate location). So for each place that's in Switzerland (country is Q39), we can get their latitude and check if it's greater than 47.8.

But how to structure the SPARQL query. Let's see.

We need to select places in Switzerland (wd:Q39 as country), then get their coordinates. Then check if the latitude part of the coordinate is greater than 47.8.

But in Wikidata, the coordinate is stored as a point, and the latitude can be extracted using the geo:lat function. However, in SPARQL, for Wikidata, the coordinates are stored as a string in the format "Point(longitude latitude)", but actually, the property wdt:P625 is a GeoShape or a point. Wait, in Wikidata, the coordinate is stored as a value of type "globe-coordinate", which has latitude and longitude. So in SPARQL, you can use the function geo:lat and geo:long to extract them.

Wait, but the SPARQL endpoint for Wikidata supports the geo: namespace. So for example, if a resource has a coordinate, you can do something like:

?place wdt:P625 ?coord.
BIND(geo:lat(?coord) AS ?lat)

Then filter where ?lat > 47.8.

But first, we need to find all places in Switzerland. But what counts as a "place"? The user might mean any location within Switzerland, but perhaps the country itself, or cities, etc. But the question is whether there's any place in Switzerland north of that point. So even the northernmost point of the country would suffice.

So the query would be:

SELECT ?place ?lat WHERE {
  ?place wdt:P17 wd:Q39.  # P17 is country, Q39 is Switzerland
  ?place wdt:P625 ?coord.
  BIND(geo:lat(?coord) AS ?lat)
  FILTER(?lat > 47.8)
}

But does this return any results? Let's check.

But wait, the northernmost point of Switzerland is at approximately 47.8083°N. So 47.8083 > 47.8, so yes. So the query should return at least that point.

But perhaps the query should check for the country's northernmost point. Alternatively, maybe the country's boundary.

But in Wikidata, the country Switzerland (Q39) has a coordinate for its capital, but also the country's boundary might have a northernmost point. However, the country itself doesn't have a single coordinate; it's a polygon. But the northernmost point of Switzerland is a specific location.

Alternatively, perhaps the query can check for the northernmost point of Switzerland. But how to get that.

Alternatively, the query can check if there's any place in Switzerland with latitude >47.8. If yes, then answer is yes.

So the SPARQL query would be:

SELECT ?place WHERE {
  ?place wdt:P17 wd:Q39.
  ?place wdt:P625 ?coord.
  BIND(geo:lat(?coord) AS ?lat)
  FILTER(?lat > 47.8)
  LIMIT 1
}

If this returns at least one result, then the answer is yes.

But let's check if this query would work.

First, we need to confirm that the country of Switzerland is Q39. Yes, Q39 is Switzerland.

Now, the property P17 is country, so for any place in Switzerland, ?place has P17 = Q39.

Then, the coordinate property P625.

Then, extract latitude and filter.

But in SPARQL, the geo:lat function is part of the GeoSPARQL standard, which is supported by Wikidata's SPARQL endpoint.

So the query should work.

But to be sure, perhaps we can check if there's any place in Switzerland with latitude >47.8.

Alternatively, maybe the northernmost point of Switzerland is a specific location. Let's see.

For example, the northernmost point of Switzerland is near Schaffhausen, at 47°48'30"N, which is 47.808333... degrees. So 47.8083 >47.8, so yes.

So the query should return that point.

So the SPARQL query would be:

SELECT ?place WHERE {
  ?place wdt:P17 wd:Q39.
  ?place wdt:P625 ?coord.
  BIND(geo:lat(?coord) AS ?lat)
  FILTER(?lat > 47.8)
  LIMIT 1
}

But maybe the place is the country itself? No, the country doesn't have a single coordinate. But the northernmost point is a specific location, perhaps a point on the border.

Alternatively, maybe the query can check for the country's boundary. But in Wikidata, the country's boundary might be represented as a polygon, but the coordinates for the boundary would be stored as a GeoShape. However, extracting the latitude from that might be more complex.

But for simplicity, the query above should work if there's any location in Switzerland with latitude >47.8.

Let's see if there's such a place. For example, the northernmost point of Switzerland is at 47.8083°N, which is north of 47.8. So yes.

So the answer should be yes.

But to confirm, we need to execute the query.

But first, let's check if the SPARQL query is correct.

Another way: perhaps the user is asking if there's any place in Switzerland north of the point (8.57, 47.8). But the point's latitude is 47.8, so north of that would be higher latitude. So yes.

But to be precise, the coordinates of the point are (longitude 8.57, latitude 47.8). So the latitude is 47.8. So any place in Switzerland with latitude >47.8 would be north of that point.

So the SPARQL query as above should work.

Now, to write the SPARQL query.

But in the SPARQL query, we need to use the correct prefixes. But since the endpoint uses the standard prefixes, we can write it as:

SELECT ?place WHERE {
  ?place wdt:P17 wd:Q39.
  ?place wdt:P625 ?coord.
  BIND(geo:lat(?coord) AS ?lat)
  FILTER(?lat > 47.8)
  LIMIT 1
}

Yes.

But let's check if the geo:lat function is available. Yes, in Wikidata's SPARQL endpoint, GeoSPARQL functions are supported.

Alternatively, perhaps the coordinate is stored as a string, but no, in Wikidata, the P625 property is a globe-coordinate, which is a structured value. So the geo:lat function should work.

So the next step is to execute this query.

But before that, maybe check if there's any place in Switzerland with coordinates. For example, the capital Bern has coordinates around 46.948°N, which is less than 47.8. But the northernmost point is higher.

So the query should return at least one result.

So the answer is yes.

But to confirm, let's see.

Alternatively, perhaps the user is referring to a specific point, but the question is whether Switzerland has any place north of that point. So the answer is yes.

So the SPARQL query would be an ASK query to check if there's at least one such place.

Because the question is "Does Switzerland have a place north of the Point (8.57 47.8)?" which is a yes/no question. So the SPARQL query should be an ASK query.

So:

ASK {
  ?place wdt:P17 wd:Q39.
  ?place wdt:P625 ?coord.
  BIND(geo:lat(?coord) AS ?lat)
  FILTER(?lat > 47.8)
}

Yes, because if there's at least one place, then ASK returns true.

So the correct SPARQL query is an ASK query.

So the steps:

1. Determine entities and properties: Switzerland is Q39, property P17 (country), P625 (coordinate location), and then extract latitude.

2. Search for entities: search for Switzerland in Wikidata. Using search_entity with "Switzerland" should return Q39.

3. Check properties: for Switzerland, what properties are there? But for the query, we need to find places within Switzerland (so P17 = Q39), then their coordinates.

4. Build the ASK query.

So the SPARQL query is ASK { ?place wdt:P17 wd:Q39; wdt:P625 ?coord. BIND(geo:lat(?coord) AS ?lat) FILTER(?lat > 47.8) }

But need to check if the syntax is correct.

In SPARQL, the ASK query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geo:lat(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

Yes.

Now, execute this query to check if it returns true.

If yes, then the answer is yes.

So the final answer is yes.

But to confirm, let's see. The northernmost point of Switzerland is at 47.8083°N, which is greater than 47.8, so the filter would be true.

Therefore, the ASK query should return true.

So the SPARQL query is correct.

Now, the answer function should return the SPARQL query and the answer.

So the answer is "Yes" or "True".

But the user's question is "Does Switzerland have a place north of the Point (8.57 47.8)?" so the answer is yes.

So the final answer is yes.

Now, to write the answer function.

But first, execute the ASK query to confirm.

But in the process, I need to call execute with the SPARQL query.

But since I'm supposed to generate the SPARQL query and then execute it.

So steps:

- Generate the SPARQL query as ASK.

- Execute it.

- If the result is true, then answer yes.

So the SPARQL query is:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geo:lat(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

Now, execute this query.

But in the function call, the execute function takes the SPARQL query.

So the tool call would be:

{
  "name": "execute",
  "arguments": {
    "kg": "wikidata",
    "sparql": "ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geo:lat(?coord) AS ?lat) . FILTER(?lat > 47.8) }"
  }
}

Then, based on the result, if it returns true, then the answer is yes.

But since I know that the northernmost point is at 47.8083, which is greater than 47.8, the result should be true.

So the answer function would have the SPARQL query and the answer "Yes".

But the answer should be in the answer function.

So the final step is to call answer with the SPARQL query and the answer.

But first, need to execute it.

But in the process, I should call execute first.

So the first step is to generate the SPARQL query and execute it.

So the tool call for execute.

Then, based on the result, if it's true, then answer yes.

So let's proceed.

execute

ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geo:lat(?coord) AS ?lat) . FILTER(?lat > 47.8) }

SPARQL execution failed:
Not supported: Function "<http://www.opengis.net/ont/geosparql#lat>" is currently not supported by QLever.

[Assistant]
Okay, the user asked if Switzerland has a place north of the point (8.57, 47.8). Wait, north of a point usually refers to latitude. So the latitude of the point is 47.8, so north would be higher latitude values. But the error says the function geo:lat isn't supported. Hmm, right, the QLever SPARQL endpoint doesn't support the geosparql functions like geo:lat. So I need to find another way to get the latitude.

Wait, in Wikidata, coordinates are stored as a point using wdt:P625, which is a GeoShape. But maybe the latitude can be extracted using another method. Let me check how Wikidata handles coordinates. Oh, right, the coordinate is stored as a value in the form of a string like "Point(8.57 47.8)", but actually, in SPARQL, when you use wdt:P625, it's a geoshape, but maybe the latitude and longitude can be extracted using the wdtn:P625 or something else? Wait, no. Alternatively, maybe the coordinates are stored as a literal with a specific format, but in SPARQL, you can use the functions like geo:lat, but the error says it's not supported.

Wait, the error message says "Function <http://www.opengis.net/ont/geosparql#lat> is currently not supported by QLever." So QLever doesn't support the geosparql functions. So I need to find another way to get the latitude. Maybe the coordinates are stored as a string, and I can parse them? But SPARQL doesn't have string parsing functions for that. Alternatively, maybe there's a different property that gives latitude and longitude separately. Let me check.

Wait, in Wikidata, the coordinate is stored as a value using wdt:P625, which is a point. But perhaps the latitude and longitude can be accessed via the wdtn:P625? No, wdtn is for normalized values. Alternatively, maybe there's a way to get the latitude and longitude as separate values. Let me think. Maybe using the function wd:lat and wd:long? No, that's not standard.

Wait, perhaps the coordinate is stored as a string in the format "Point(longitude latitude)", so maybe I can extract the latitude part by splitting the string. But SPARQL has functions like substring, but I need to know the exact format. For example, the value might be something like "Point(8.57 47.8)", so the latitude is the second number. But how to extract that?

Alternatively, maybe the coordinates are stored as a literal with a specific datatype, but I'm not sure. Let me check the actual data. For example, take a Swiss city, like Zurich. Its coordinates are stored as a point. Let's see: in Wikidata, Zurich (Q274) has P625 as a coordinate. If I query for that, what's the value? Let's say it's "Point(8.54 47.37)".

But in SPARQL, when you retrieve wdt:P625, it's a literal of type geo:wktLiteral. So the value is a string like "Point(8.54 47.37)". To get the latitude, perhaps we can use string functions. For example, using regex to extract the numbers. But QLever might support regex functions. Let me check.

QLever does support some string functions. For example, regex. So maybe I can use regex to extract the latitude. Let's see. The WKT format for a point is "Point(longitude latitude)", so the latitude is the second number. So for example, "Point(8.57 47.8)" would have longitude 8.57 and latitude 47.8. So to get the latitude, we can split the string.

But how to do that in SPARQL. Let's see. For example, using regex to capture the second number. Let's say the string is "Point(8.57 47.8)", then the regex might be "Point\\((\\d+\\.\\d+) (\\d+\\.\\d+)\\)". But maybe the numbers can have different formats. Alternatively, use substring functions. But perhaps it's easier to use regex.

Alternatively, maybe there's a better way. Wait, in Wikidata, there's a property for latitude and longitude separately? Let me check. No, I think the standard way is to use P625 as a coordinate point, and then use the geosparql functions, but since QLever doesn't support them, we need to parse the string.

So, in SPARQL, for the coordinate literal, we can use regex to extract the latitude. Let's try that.

So the query would be something like:

SELECT ?place ?lat
WHERE {
  ?place wdt:P17 wd:Q39 . # Switzerland
  ?place wdt:P625 ?coord .
  FILTER regex(?coord, "Point\\(.* (\\d+\\.\\d+)\\)") .
  BIND( xsd:double( regex( ?coord, "Point\\(.* (\\d+\\.\\d+)\\)", "$1" ) ) AS ?lat )
  FILTER( ?lat > 47.8 )
}

Wait, but the regex might not capture correctly. Let's see. The WKT for a point is "Point(longitude latitude)", so the string starts with "Point(", then longitude, space, latitude, then closing parenthesis. So the pattern would be "Point\\(([^ ]+) ([^)]+)\\)".

So for example, "Point(8.57 47.8)" would have longitude 8.57 and latitude 47.8. So the regex for latitude would be the second group.

So in SPARQL, using regex to extract the latitude part.

So the query would be:

SELECT ?place ?lat
WHERE {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  FILTER regex(?coord, "Point\\(([^ ]+) ([^)]+)\\)") .
  BIND( xsd:double( regex( ?coord, "Point\\(([^ ]+) ([^)]+)\\)", "$2" ) ) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But then, to check if there's any such place, we can use ASK.

So the ASK query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  FILTER regex(?coord, "Point\\(([^ ]+) ([^)]+)\\)") .
  BIND( xsd:double( regex( ?coord, "Point\\(([^ ]+) ([^)]+)\\)", "$2" ) ) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But wait, the regex might not work because the coordinates might have more decimal places or different formatting. Also, the WKT might have different representations. For example, sometimes it's "Point(8.57 47.8)" but maybe with more precision. But the regex should capture the numbers.

Alternatively, maybe the coordinate is stored as a string in the format "Point(8.57 47.8)", so the latitude is the second number. So using regex to extract the second number.

But let's test this. Let's say the coord is "Point(8.57 47.8)", then the regex "Point\\(([^ ]+) ([^)]+)\\)" would match, and $2 would be "47.8".

Yes. So the BIND would convert that to a double.

But QLever supports regex and xsd:double? Let's check. QLever does support regex and xsd:double functions.

So the ASK query would check if there's any place in Switzerland (P17 is country, wd:Q39 is Switzerland) where the latitude (extracted from the coordinate) is greater than 47.8.

Wait, the user's point is (8.57, 47.8), which is longitude 8.57, latitude 47.8. So north of that point would be higher latitude. So latitude > 47.8.

So the query should check for places in Switzerland where latitude > 47.8.

So the ASK query would return true if there's at least one such place.

So the correct SPARQL query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  FILTER regex(?coord, "Point\\(([^ ]+) ([^)]+)\\)") .
  BIND( xsd:double( regex( ?coord, "Point\\(([^ ]+) ([^)]+)\\)", "$2" ) ) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But wait, the regex might not capture correctly. Let's see. For example, if the coordinate is "Point(8.57 47.8)", then the regex "Point\\(([^ ]+) ([^)]+)\\)" would match. The first group is 8.57, second is 47.8. So $2 is the latitude.

Yes. So the BIND would take the second group and convert to double.

But maybe the WKT format could have different spacing, like "Point( 8.57 47.8 )" but probably not. Usually, it's "Point(8.57 47.8)" without extra spaces.

Alternatively, maybe the regex can be more flexible. Like "Point\\s*\\(\\s*([\\d.]+)\\s+([\\d.]+)\\s*\\)" but perhaps that's overcomplicating.

But for simplicity, let's use the regex as "Point\\(([^ ]+) ([^)]+)\\)".

But maybe the actual data uses a different format. Let's check with an example. For instance, the city of Bern in Switzerland. Its coordinates are Point(7.448055555555556 46.94777777777778). So the WKT string is "Point(7.448055555555556 46.94777777777778)".

So the regex would capture the first number as 7.448..., second as 46.947..., so the latitude is the second number.

Yes. So the regex should work.

So the ASK query would check if there's any place in Switzerland where the latitude (second number in the WKT string) is greater than 47.8.

Now, let's execute this query.

But first, I need to make sure that the regex is correctly written in SPARQL. In SPARQL, the regex function uses the pattern as a string, so the backslashes need to be escaped. So in the SPARQL string, the regex pattern would be "Point\\\\(([^ ]+) ([^)]+)\\\\)" but actually, in the SPARQL query string, the backslashes need to be escaped. So for example, in the SPARQL query, the regex would be written as "Point\\(([^ ]+) ([^)]+)\\)" but when written in a string in code, it's "Point\\(([^ ]+) ([^)]+)\\)".

Wait, in the SPARQL query itself, the regex pattern is a string. So for example, in the SPARQL query:

FILTER regex(?coord, "Point\\(([^ ]+) ([^)]+)\\)")

But in the actual string passed to the execute function, the backslashes need to be escaped. So for example, in JSON, the string would have double backslashes. So "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Wait, no. Let's think. In the SPARQL query, the regex pattern is written as a string. So in the SPARQL query, to write a regex pattern that has a backslash, you need to escape it. So for example, to match a literal parenthesis, you need to write \( in the regex pattern. But in the SPARQL string, since the string is enclosed in quotes, the backslash needs to be escaped. So in the SPARQL query, the regex pattern would be "Point\\(([^ ]+) ([^)]+)\\)", but when written in a JSON string, each backslash needs to be escaped again. So in the JSON, it would be "Point\\\\(([^ ]+) ([^)]+)\\\\)".

But perhaps it's better to test. Let's see. For example, in the SPARQL query, the regex pattern is "Point\\(([^ ]+) ([^)]+)\\)". When written in a string in the JSON, the backslashes need to be doubled. So the actual string would be "Point\\\\(([^ ]+) ([^)]+)\\\\)".

But maybe the QLever SPARQL engine handles it correctly. Alternatively, perhaps using single quotes for the regex pattern. But in SPARQL, strings are in double quotes.

Alternatively, maybe the regex can be written without escaping the parentheses. Wait, no. Because in regex, parentheses are special characters, so to match a literal parenthesis, you need to escape them with a backslash. So in the regex pattern, it's "Point\\(" to match "Point(".

But in the SPARQL string, the backslash needs to be escaped. So in the SPARQL query, the pattern would be "Point\\(", but when written in a JSON string, it's "Point\\\\(".

So for example, the SPARQL query would have:

FILTER regex(?coord, "Point\\\\(([^ ]+) ([^)]+)\\\\)")

But maybe it's better to check. Alternatively, perhaps using a different approach. Let's see.

Alternatively, maybe the coordinates are stored as a string in the format "Point(longitude latitude)", so the latitude is the part after the space and before the closing parenthesis. So perhaps using substring functions.

For example, the string starts with "Point(", then the longitude, then space, then latitude, then ")".

So to get the latitude, we can find the position of the space after "Point(", then take the substring from there to the closing parenthesis.

But SPARQL has substring functions. Let's see.

For example, using substring after the first space. But it's complicated.

Alternatively, using regex is easier.

So let's proceed with the regex approach.

So the SPARQL query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  FILTER regex(?coord, "Point\\(([^ ]+) ([^)]+)\\)") .
  BIND( xsd:double( regex( ?coord, "Point\\(([^ ]+) ([^)]+)\\)", "$2" ) ) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But when writing this in the JSON for the execute function, the backslashes need to be escaped. So in the JSON string, the regex pattern would be "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Wait, let's see. In the SPARQL query string, the regex pattern is "Point\\(([^ ]+) ([^)]+)\\)". But when this is written in a JSON string, each backslash must be escaped, so it becomes "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Yes. So in the execute function's sparql parameter, the string would have double backslashes.

So the SPARQL query string would be:

"ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . FILTER regex(?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\") . BIND( xsd:double( regex( ?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\", \"$2\" ) ) AS ?lat ) . FILTER( ?lat > 47.8 ) }"

But perhaps the quotes inside the string need to be escaped. So in JSON, the entire SPARQL query is a string, so the double quotes inside need to be escaped with backslashes.

So the actual sparql parameter would be:

"ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . FILTER regex(?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\") . BIND( xsd:double( regex( ?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\", \"$2\" ) ) AS ?lat ) . FILTER( ?lat > 47.8 ) }"

But maybe the regex function in SPARQL doesn't require the quotes inside the regex pattern. Wait, no. The regex function takes the pattern as a string, so in the SPARQL query, it's written as "Point\\(([^ ]+) ([^)]+)\\)".

But when constructing the JSON for the execute function, the entire SPARQL query is a string, so the double quotes inside need to be escaped. So for example:

"ASK { ... FILTER regex(?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\") ... }"

Yes.

Alternatively, maybe using single quotes for the regex pattern in SPARQL. But SPARQL uses double quotes for strings.

So the correct way is to have the SPARQL query string with escaped quotes.

So the execute function call would have:

sparql: "ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . FILTER regex(?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\") . BIND( xsd:double( regex( ?coord, \"Point\\\\(([^ ]+) ([^)]+)\\\\)\", \"$2\" ) ) AS ?lat ) . FILTER( ?lat > 47.8 ) }"

But let's check if this works.

Alternatively, maybe the regex can be simplified. For example, the pattern could be "Point\\s*\\(\\s*([\\d.]+)\\s+([\\d.]+)\\s*\\)" to handle any whitespace.

But perhaps for simplicity, let's try the first approach.

Now, let's execute this query.

But first, let's check if there's a place in Switzerland with latitude >47.8.

For example, the city of St. Gallen has latitude around 47.4, which is less than 47.8. Zurich is around 47.37. Bern is 46.95. What about places north of 47.8? Let's see. The northernmost point of Switzerland is near the German border. For example, the town of Schaffhausen is around 47.7, but maybe some areas are higher. Wait, 47.8 is about 47 degrees 48 minutes north. The northernmost point of Switzerland is around 47.8 degrees north. Let me check.

Actually, the northernmost point of Switzerland is at approximately 47.80° N. So there might be places exactly at 47.8 or slightly higher. But the user is asking if there's a place north of (8.57, 47.8), which would mean latitude >47.8. So if the northernmost point is exactly 47.8, then there's no place north of it. But perhaps some areas are slightly higher.

Wait, let's check the coordinates of the northernmost point of Switzerland. According to some sources, the northernmost point of Switzerland is at 47°48' N, which is 47.8 degrees. So latitude 47.8. So if the user is asking for north of 47.8, then strictly greater than 47.8, then there are no places. But maybe some places have latitude slightly higher.

But perhaps the actual data in Wikidata has some places with latitude >47.8.

Alternatively, maybe the query will return false.

But regardless, the SPARQL query needs to be correct.

So let's proceed to execute the query with the regex approach.

So the next step is to call the execute function with the corrected SPARQL query.

ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . FILTER regex(?coord, "Point\\(([^ ]+) ([^)]+)\\)") . BIND( xsd:double( regex( ?coord, "Point\\(([^ ]+) ([^)]+)\\)", "$2" ) ) AS ?lat ) . FILTER( ?lat > 47.8 ) }

SPARQL execution failed:
Invalid SPARQL query: Invalid regex flag '$' found in "$2". The only supported flags are 'i', 'm', 's', 'U', and any combination of them

[Assistant]
Okay, let's see. The user is asking if Switzerland has a place north of the point (8.57 47.8). Wait, north of a point usually refers to latitude. But latitude increases as you go north, so a place north of 47.8 would have a latitude greater than 47.8. But the point given is (8.57, 47.8), which is longitude 8.57 and latitude 47.8. So the question is whether there's any location in Switzerland with latitude greater than 47.8.

First, I need to check the coordinates of places in Switzerland. Switzerland's country code is Q39 in Wikidata. The property for coordinates is P625 (wdt:P625). So the basic structure is: find places in Switzerland (P17 is country, so wd:Q39), then get their coordinates, and check if the latitude is above 47.8.

But the previous attempts had issues with the geosparql functions. The error said that geo:lat isn't supported. So maybe in QLever, the way to extract latitude and longitude from a coordinate is different. Let me recall: in Wikidata, the coordinate is stored as a string in the format "Point(longitude latitude)" or maybe as a GeoJSON string. Wait, actually, in Wikidata, the P625 property uses a value of type "globe-coordinate", but when retrieved, it's often represented as a string like "Point(8.57 47.8)" or similar.

Wait, but in SPARQL, when you have a coordinate, you can use the functions from the GeoSPARQL standard. However, the error message says that geo:lat is not supported. So maybe QLever doesn't support the GeoSPARQL functions. So perhaps the way to extract latitude and longitude is by parsing the string.

In the first attempt, the user tried to use geo:lat, which isn't supported. Then the second attempt tried using regex to extract the latitude part. But the regex had an error because of the $2. Wait, in SPARQL regex, the replacement string uses $1, $2, etc., but maybe the syntax is different. Let me check: in SPARQL, when using regex, the third argument of the regex function is the pattern, and then you can use the replace function. Wait, no. Let me think.

Actually, in SPARQL, the regex function is used to check if a string matches a pattern, but to extract parts, you might need to use the replace function. Alternatively, perhaps using the regex in the FILTER with capturing groups. Wait, but the error message says "Invalid regex flag '$' found in "$2". The only supported flags are 'i', 'm', 's', 'U', and any combination of them". So maybe the problem is that in the regex pattern, the $2 is being used as a flag, but flags are only i, m, s, U. So perhaps the way to extract the latitude is different.

Wait, the SPARQL query was:

FILTER regex(?coord, "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2")

But in SPARQL, the regex function's third argument is the flags, not the replacement. So maybe the correct way is to use the replace function. Let me check.

Alternatively, maybe the coordinate is stored as a literal in the format "Point(8.57 47.8)", so the string is something like "Point(8.57 47.8)". So to extract the latitude part (the second number), we can use regex to capture the numbers.

But in SPARQL, the regex function is used for matching, but to extract parts, you might need to use the replace function. For example:

BIND( REPLACE(STR(?coord), "Point\\((\\d+\\.\\d+) (\\d+\\.\\d+)\\)", "$2") AS ?lat )

Wait, but the STR function converts the coordinate to a string. Because the coordinate might be a literal of type "globe-coordinate", but in SPARQL, when you have a literal with a datatype, you need to convert it to a string first.

Wait, in Wikidata, the P625 property returns a value that's a literal with the datatype "http://www.opengis.net/ont/geosparql#wktLiteral", which is a string like "Point(8.57 47.8)". So the actual value is a string. So perhaps we can use STR(?coord) to get the string, then use regex to extract the latitude.

But in SPARQL, the regex function is used for matching, but to extract a substring, you can use the replace function. For example:

BIND( REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat )

But the problem is that the regex pattern needs to be correctly written. Let's see: the string is "Point(8.57 47.8)", so the pattern would be "Point\\(([^ ]+) ([^)]+)\\)". Then, the first group is the longitude, the second is the latitude. So using replace with "$2" would give the latitude.

But in SPARQL, the replace function's syntax is REPLACE(string, pattern, replacement). So for example:

BIND( REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat )

But wait, the pattern should capture the parts. Let's test with a sample string: "Point(8.57 47.8)".

The pattern "Point\\(([^ ]+) ([^)]+)\\)" would match:

- "Point(" followed by a group of non-space characters (8.57), then a space, then a group of non-")" characters (47.8), then ")".

So the first group is 8.57, second is 47.8. Then replacing the entire string with "$2" would give "47.8".

But in SPARQL, the replace function uses $1, $2 for the captured groups. So yes, that's correct.

But the error in the previous attempt was "Invalid regex flag '$' found in "$2". The only supported flags are 'i', 'm', 's', 'U', and any combination of them". Wait, that suggests that the third argument of the regex function was being treated as flags. But in the previous query, the user used:

FILTER regex(?coord, "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2")

But the regex function in SPARQL is used for matching, not for replacing. The regex function takes three arguments: string, pattern, flags. So the third argument is the flags. So if you write "$2" as the third argument, that's invalid because $2 is not a valid flag. So that's why the error occurred.

So the correct approach is to use the REPLACE function, not the regex function for extraction. So the correct way is to use REPLACE.

So let's adjust the query.

First, get the coordinate as a string using STR(?coord), then use REPLACE to extract the latitude part.

So the query would be:

SELECT ?place ?lat
WHERE {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND( REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat_str )
  BIND( xsd:double(?lat_str) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But wait, the user is asking for an ASK query: does Switzerland have any place north of 47.8 latitude. So the ASK query would check if there exists at least one such place.

So the ASK query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND( REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat_str )
  BIND( xsd:double(?lat_str) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But let's check the regex pattern. The string might have spaces or other characters. For example, the WKT format for a point is "Point(longitude latitude)", so the exact string is "Point(8.57 47.8)". So the pattern should match "Point(" followed by some characters (the longitude), then a space, then latitude, then ")".

So the pattern is "Point\\(([^ ]+) ([^)]+)\\)".

But in SPARQL, the backslashes need to be escaped, so in the string, it's "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Wait, in the SPARQL string, when writing the regex pattern, each backslash needs to be escaped. So for "Point\\(", in the string it's "Point\\\\(".

So the correct pattern in the REPLACE function would be "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Wait, let's see: in the string, to represent a literal backslash, you need two backslashes. So for the regex pattern "Point\(([^ ]+) ([^)]+)\)", in SPARQL string, it's written as "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Yes. Because each backslash in the regex needs to be escaped in the string. So for example, the regex pattern "Point\(" becomes "Point\\\\(" in the SPARQL string.

So the correct REPLACE would be:

BIND( REPLACE(STR(?coord), "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2") AS ?lat_str )

Then convert that to a double.

But let's test this with an example. Suppose ?coord is "Point(8.57 47.8)".

STR(?coord) is "Point(8.57 47.8)".

REPLACE with pattern "Point\\\\(([^ ]+) ([^)]+)\\\\)" and replacement "$2" would replace the entire string with the second captured group, which is "47.8".

Yes. Then xsd:double("47.8") is 47.8.

So the FILTER would check if that's greater than 47.8. But in this case, 47.8 is not greater than 47.8, so it would not count. But if there's a place with latitude 47.9, then it would.

So the ASK query would return true if there's at least one such place.

But let's check if Switzerland has any places north of 47.8. The latitude of Switzerland's capital, Bern, is about 46.95, but some parts of Switzerland are higher. For example, the highest point in Switzerland is Dufourspitze at 46.00°N? Wait, no. Wait, latitude increases northward. So 47.8 is already north of Bern (which is around 46.95). Wait, but Switzerland's latitude ranges from about 45.9°N to 47.8°N. Wait, actually, the northernmost point of Switzerland is at about 47.8°N. Let me check.

Wait, the coordinates of Switzerland's northernmost point is around 47.8°N. So maybe there's no place north of 47.8. But I need to confirm.

But regardless, the query should check.

But the problem is whether the SPARQL query works.

So let's try to construct the correct ASK query.

First, the ASK query:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND( REPLACE(STR(?coord), "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2") AS ?lat_str )
  BIND( xsd:double(?lat_str) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But let's check if the regex pattern is correct. Let's see: the string is "Point(8.57 47.8)", so the pattern "Point\\\\(([^ ]+) ([^)]+)\\\\)" should match.

But in the REPLACE function, the pattern is a regex. So the pattern is "Point\(([^ ]+) ([^)]+)\)", which in the SPARQL string is written as "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Yes.

Now, testing this query.

But maybe there's a better way. Alternatively, in Wikidata, the coordinate is stored as a literal of type "globe-coordinate", but when you query it, it's a string. However, perhaps there's a way to use the geo:lat function, but the previous error says it's not supported. So maybe the only way is to parse the string.

Alternatively, perhaps the coordinate is stored as a string in the format "Point(longitude latitude)", so the latitude is the second number.

Another approach: use the regex to extract the latitude part as a string, then convert to double.

So the query should work.

Let's try to execute this query.

But first, let's check if the pattern is correct. Let's take an example.

Suppose the coordinate is "Point(8.57 47.8)".

STR(?coord) is "Point(8.57 47.8)".

REPLACE(STR(?coord), "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2") would replace the entire string with the second captured group, which is "47.8".

Yes.

Then xsd:double("47.8") is 47.8.

So the FILTER ?lat > 47.8 would be false for that example.

Now, let's check if there's any place in Switzerland with latitude >47.8.

Looking up Switzerland's coordinates: the northernmost point of Switzerland is at approximately 47.8°N. So maybe there's no place north of 47.8. So the ASK query would return false.

But to confirm, let's see. For example, the city of Basel has a latitude of about 47.55°N. The northernmost point is near the border with Germany, maybe around 47.8°N. So perhaps the maximum latitude in Switzerland is 47.8, so no place is north of that.

But to be sure, the query should check.

So the correct SPARQL query is the ASK query as above.

Now, let's check the syntax again for the REPLACE function.

In SPARQL, the REPLACE function takes three arguments: string, pattern, replacement.

So in the query:

BIND( REPLACE(STR(?coord), "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2") AS ?lat_str )

Yes.

Then convert to double.

So the full ASK query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND( REPLACE(STR(?coord), "Point\\\\(([^ ]+) ([^)]+)\\\\)", "$2") AS ?lat_str )
  BIND( xsd:double(?lat_str) AS ?lat )
  FILTER( ?lat > 47.8 )
}

But let's check for possible errors. For example, some coordinates might not be in the "Point(...)" format. But in Wikidata, the P625 property uses WKT, which for points is "Point(longitude latitude)".

So this should work.

Now, let's execute this query.

Wait, but in the previous attempt, the user tried using regex in the FILTER, which was wrong. Now using REPLACE should fix it.

So the correct SPARQL query is as above.

Let's try to execute it.

But to be safe, let's check if the pattern is correct. Let's see: the string is "Point(8.57 47.8)", so the pattern "Point\\\\(([^ ]+) ([^)]+)\\\\)".

Breaking it down:

- "Point\\\\(" : matches "Point(" (with two backslashes for each in the string)
- Then ([^ ]+) : matches one or more non-space characters (longitude)
- Then a space
- Then ([^)]+) : matches one or more non-")" characters (latitude)
- Then \\\\) : matches the closing parenthesis.

Yes.

So the REPLACE function will replace the entire string with the second group, which is the latitude.

Then converting to double.

So the query should work.

Let's try to execute this query.

So the next step is to call execute with this SPARQL query.

ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat_str) . BIND(xsd:double(?lat_str) AS ?lat) . FILTER(?lat > 47.8) }

[Assistant]
Okay, let's see. The user asked if Switzerland has a place north of the point (8.57 47.8). Wait, north of a point usually refers to latitude. So the latitude of the point is 47.8, so north would be higher latitude values. So we need to check if there's any place in Switzerland (country code Q39) with latitude greater than 47.8.

First, the initial query used geo:lat, but that's not supported. Then tried regex on the coordinate string. The first regex attempt had an issue with the $2 flag. Then the next attempt used REPLACE to extract the latitude part.

Wait, the coordinate in Wikidata is stored as a GeoJSON string, like "Point(8.57 47.8)". So to get the latitude, which is the second number in the Point. So the string would be "Point(8.57 47.8)", so the latitude is 47.8. So to extract that, the regex should capture the part after the space inside the parentheses.

But in the previous query, they used REPLACE with "$2" which might not be correct. Let's think: the regex pattern for "Point(8.57 47.8)" would be "Point\\(([^ ]+) ([^)]+)\\)". So the first group is the longitude (8.57), the second group is the latitude (47.8). So when using REPLACE, the replacement string would be "$2" to get the latitude. But maybe the problem was with the way the regex was written.

Wait, in the third attempt, the query was:

BIND(REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat_str)

But the REPLACE function in SPARQL uses the regex pattern and replaces the entire match with the replacement string. So if the pattern matches "Point(8.57 47.8)", then the replacement string "$2" would take the second capturing group, which is the latitude. But maybe the issue is that the REPLACE function in QLever doesn't support the $2 syntax? Or maybe the regex pattern is not correctly matching.

Alternatively, maybe the coordinate is stored as a literal in the format "Point(8.57 47.8)", so STR(?coord) would give that string. Then using regex to extract the latitude part.

But perhaps a better way is to use the geof:latitude function, but the error said geo:lat isn't supported. Wait, maybe the correct function is geof:latitude? Let me check.

Wait, in the first query, they used geo:lat, but maybe the correct function is geof:latitude. Because in the geosparql standard, the functions are under geof: namespace. Let me check.

Yes, in GeoSPARQL, the functions are in the geof namespace. So for latitude, it's geof:latitude. So maybe the first query should have used geof:latitude instead of geo:lat.

But the error message said "Not supported: Function "<http://www.opengis.net/ont/geosparql#lat>" is currently not supported by QLever." So the function geo:lat isn't supported. But maybe geof:latitude is supported?

Wait, the geosparql namespace is http://www.opengis.net/ont/geosparql#, so the function geof:latitude would be in the geof namespace. Let me check the prefixes. The available prefixes include geo: <http://www.opengis.net/ont/geosparql#>, and geof: <http://www.opengis.net/def/function/geosparql/>. So geof:latitude is the correct function.

So maybe the first query should have used geof:latitude instead of geo:lat. Let's try that.

So the correct query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

But the first attempt used geo:lat, which is not the correct function. The correct function is geof:latitude.

So let's check if that works. Let's execute this query.

Wait, but the user's point is (8.57 47.8), so the latitude is 47.8. So north of that would be latitude > 47.8. So the query should check if there's any Swiss place with latitude > 47.8.

But Switzerland's latitude ranges from about 45.8 to 47.8. Wait, the highest point in Switzerland is Dufourspitze at around 46.0°N. Wait, no, actually, the northernmost point of Switzerland is at about 47.8°N. Wait, the user's point is (8.57, 47.8), which is a specific coordinate. So if the latitude is 47.8, then north would be higher than 47.8. But Switzerland's maximum latitude is around 47.8, so maybe there's no place north of that.

Wait, the northernmost point of Switzerland is at approximately 47.8°N. So if the point given is 47.8, then there's no place north of that in Switzerland. So the answer should be false.

But let's check the actual query. Let's try the correct function.

So the correct SPARQL query would use geof:latitude. Let's try that.

So the query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

If this returns false, then there are no places in Switzerland with latitude greater than 47.8.

But in the previous attempt, when they used the regex method, the result was False. But maybe the correct way is to use geof:latitude.

Wait, but the first error was because they used geo:lat, which isn't supported. But geof:latitude is part of the geof namespace. Let's check if QLever supports geof:latitude.

Assuming that QLever supports geof:latitude, then the correct query would be using that.

So let's try executing that.

But in the previous steps, when they tried the regex method, the result was False. But maybe the correct way is to use the geof function.

But let's see. Let's check the actual data. For example, the northernmost point of Switzerland is at 47.804°N. So if the point is 47.8, then 47.804 is greater than 47.8, so there would be a place north of it. But wait, the user's point is (8.57, 47.8), so latitude 47.8. So if there's a place with latitude higher than 47.8, then yes.

But according to geographical data, the northernmost point of Switzerland is at approximately 47.804°N, which is just north of 47.8. So there should be places north of 47.8.

Wait, but maybe the coordinate in Wikidata for the northernmost point is stored as a point with latitude 47.804. So the query should return true.

But in the previous regex attempt, the result was False. So perhaps the regex approach was incorrect.

Let's check the correct way. Let's try using geof:latitude.

So the correct query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

But does QLever support geof:latitude?

The error message for the first attempt said that geo:lat is not supported. But geof:latitude is a different function. Let's check the prefixes. The prefix geof is defined as <http://www.opengis.net/def/function/geosparql/>, so geof:latitude is the correct function.

So perhaps the first attempt used geo:lat instead of geof:latitude. Let's try that.

So let's execute the query with geof:latitude.

But in the previous step, when they tried the regex method, the result was False. But maybe the regex method was incorrect. Let's see.

Alternatively, maybe the coordinate is stored as a literal in the format "Point(8.57 47.8)", so the latitude is the second number. So to extract it, the correct regex would be to capture the part after the space inside the parentheses.

For example, the string is "Point(8.57 47.8)", so the regex pattern should be "Point\\(([^ ]+) ([^)]+)\\)", then the second group is the latitude.

But in the third attempt, the query was:

BIND(REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat_str)

But REPLACE replaces the entire match with the replacement string. So if the pattern matches the entire string, then replacing with "$2" would take the second capturing group. So for "Point(8.57 47.8)", the pattern matches the whole string, and the replacement would be "47.8", which is correct.

But the error message said "Invalid regex flag '$' found in "$2". The only supported flags are 'i', 'm', 's', 'U', and any combination of them". So maybe the REPLACE function in QLever doesn't support the $2 syntax. Maybe it's using a different syntax for capturing groups.

Alternatively, maybe the correct way is to use the regex function to extract the group. For example, using REGEX with a capturing group and then using the group.

But in SPARQL, there's a function called regex() that can be used to check if a string matches a pattern, but to extract a group, perhaps using the STRBEFORE or STRAFTER functions.

Alternatively, since the coordinate is stored as a GeoJSON string, perhaps the correct way is to use the geof:latitude function.

Let me check if QLever supports geof:latitude. Since the error for geo:lat was that it's not supported, but geof:latitude might be supported.

Let's try executing the query with geof:latitude.

So the query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

If this returns true, then yes, there is a place north of 47.8. If false, then no.

But according to geographical data, Switzerland's northernmost point is around 47.804°N, which is north of 47.8. So the answer should be true.

But in the previous regex attempt, the result was False. So perhaps the regex approach was incorrect.

Let's try to execute the geof:latitude query.

Wait, but the user's previous attempt with the regex had an error. Let's try the correct function.

So let's call execute with the correct query.

But first, let's check if geof:latitude is supported.

Alternatively, maybe the coordinate is stored as a literal in the format "Point(8.57 47.8)", so the geof:latitude function can parse it.

Let's try that.

So the SPARQL query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

If this returns true, then yes. If false, then no.

But let's see. Let's execute this query.

But in the previous steps, the user tried using geo:lat which is not supported, then tried regex with errors, then another regex which returned False.

But perhaps the correct query is using geof:latitude.

Let's try that.

So the next step is to execute the query with geof:latitude.

But the user's previous attempt with the regex returned False, but maybe that's because the regex was incorrect.

Alternatively, maybe the coordinate in Wikidata for Swiss places is stored in a different format. Let's check.

For example, take the northernmost point of Switzerland. Let's find its Wikidata item.

The northernmost point of Switzerland is in the canton of Schaffhausen, at approximately 47.804°N.

Let's check the Wikidata item for that point. But perhaps it's easier to check a known Swiss city.

For example, Zurich has coordinates around 8.54°E, 47.37°N. So latitude 47.37, which is less than 47.8.

But the northernmost point of Switzerland is around 47.804°N. So if the query is for latitude >47.8, then yes, there is a place.

So the correct query should return true.

But why did the previous regex attempt return False? Let's see.

In the third attempt, the query was:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "$2") AS ?lat_str) .
  BIND(xsd:double(?lat_str) AS ?lat) .
  FILTER(?lat > 47.8)
}

But the error was "Invalid regex flag '$' found in "$2". The only supported flags are 'i', 'm', 's', 'U', and any combination of them".

So maybe the REPLACE function in QLever doesn't support $2 for capturing groups. Instead, perhaps it uses a different syntax, like \2.

In some regex implementations, the backreference is \2 instead of $2.

So maybe the correct way is to use \2 instead of $2.

So the REPLACE function would be:

BIND(REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "\\2") AS ?lat_str)

But let's check.

In SPARQL, the REPLACE function uses the regex pattern and the replacement string. In some implementations, the backreference is \1, \2, etc., not $1, $2.

So perhaps the correct replacement string is "\\2" instead of "$2".

Let's try that.

So the query would be:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(REPLACE(STR(?coord), "Point\\(([^ ]+) ([^)]+)\\)", "\\2") AS ?lat_str) .
  BIND(xsd:double(?lat_str) AS ?lat) .
  FILTER(?lat > 47.8)
}

Let's execute this.

If this works, then it should return true.

Alternatively, using geof:latitude might be better.

Let's check if geof:latitude is supported.

In the QLever documentation, the supported functions include geof:latitude, geof:longitude, etc.

So let's try the geof:latitude version.

So the query:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

If this returns true, then yes.

But let's see. Let's execute this.

Assuming that QLever supports geof:latitude, then this should work.

So the next step is to execute this query.

If it returns true, then the answer is yes. If false, then no.

But according to geographical data, there is a place in Switzerland with latitude >47.8 (the northernmost point is ~47.804), so the answer should be true.

But let's confirm.

Let's execute the query with geof:latitude.

So the SPARQL query is:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

If this returns true, then the answer is yes.

Otherwise, no.

Let's try that.

ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geof:latitude(?coord) AS ?lat) . FILTER(?lat > 47.8) }

[Assistant]
{"name": "answer", "arguments": {"kg": "wikidata", "sparql": "ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geof:latitude(?coord) AS ?lat) . FILTER(?lat > 47.8) }", "answer": "Yes"}}

Okay, let's see. The user asked if Switzerland has a place north of the point (8.57 47.8). Wait, north of a point would mean higher latitude, right? Because latitude increases as you go north. So the point given is 8.57 longitude and 47.8 latitude. So we need to check if there's any location in Switzerland (which is country Q39) with latitude greater than 47.8.

First, I need to get the coordinates for places in Switzerland. The coordinate property in Wikidata is P625, which is a GeoShape or a point. But in SPARQL, how do we extract the latitude?

Earlier attempts had issues with the geosparql functions. The first try used geo:lat, but QLever doesn't support that. Then tried regex on the string, but the regex flags were wrong. Then used REPLACE to get the latitude string, but maybe that's not the right way.

Wait, the last attempt used geof:latitude. Let me check. The geof namespace is http://www.opengis.net/def/function/geosparql/. So geof:latitude should be the correct function. But when I ran that query, the result was True. So there is at least one place in Switzerland with latitude >47.8.

Wait, the user's point is (8.57, 47.8). So latitude 47.8. So north of that would be latitude >47.8. So if there's any place in Switzerland with latitude higher than 47.8, then the answer is yes.

The last execute query was ASK { ?place wdt:P17 wd:Q39 . ?place wdt:P625 ?coord . BIND(geof:latitude(?coord) AS ?lat) . FILTER(?lat > 47.8) } and the result was True. So that means there is at least one such place.

But wait, the user's question is "Does Switzerland have a place north of the Point (8.57 47.8)?" So the point is (longitude 8.57, latitude 47.8). So north of that point would mean higher latitude. So yes, if there's any location in Switzerland with latitude >47.8.

But maybe the user meant north of the point in terms of the coordinate system. So latitude higher than 47.8. So the answer is yes.

But let's confirm. For example, the northernmost point of Switzerland is around 47.8 degrees north? Wait, no. Switzerland's latitude ranges from about 45.9 to 47.8. Wait, maybe not. Let me check. Wait, the northernmost point of Switzerland is near Schaffhausen, which is around 47.8 degrees north. Wait, but maybe some places are slightly higher. Wait, maybe the point given is exactly the northernmost point. But according to the query result, the ASK query returned True, meaning there is at least one place in Switzerland with latitude >47.8. But that might not be correct. Wait, maybe the query is correct.

Wait, the ASK query in the last attempt was executed and returned True. So according to the system, there is such a place. So the answer is yes.

But let's check. Let's see, the coordinates of Switzerland. The northernmost point of Switzerland is at approximately 47.804°N. So if the point given is 47.8, then 47.804 is higher, so yes. So there is a place north of that point.

So the correct answer is yes. The SPARQL query should check for any place in Switzerland (P17=Q39) with latitude >47.8.

But the previous query used geof:latitude, which worked. So the final answer is yes.

So the SPARQL query is:

ASK {
  ?place wdt:P17 wd:Q39 .
  ?place wdt:P625 ?coord .
  BIND(geof:latitude(?coord) AS ?lat) .
  FILTER(?lat > 47.8)
}

And the result was True, so the answer is yes.

So the answer should be "Yes" or "True".

But the user's question is "Does Switzerland have a place north of the Point (8.57 47.8)?" So the answer is yes.

So the final answer is yes.

Now, to present this in the answer function.