PREFIX fb: <http://rdf.freebase.com/ns/>
SELECT ?institution WHERE {
  fb:m.08304 fb:people.person.education ?edu .
  ?edu fb:education.education.institution ?institution .
}

Got 3 rows and 1 column:
| institution                         |
| ----------------------------------- |
| Exeter College, Oxford (fb:m.0ylvj) |
| Marlborough College (fb:m.0173s9)   |
| University of Oxford (fb:m.07tgn)   |

William Morris attended the institutions identified by the following IRIs: fb:m.0ylvj (Exeter College, Oxford), fb:m.0173s9 (Marlborough College), and fb:m.07tgn (University of Oxford).

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

You have access to the following knowledge graphs:
freebase at http://galera:7002

You can use the following SPARQL prefixes implicitly in all functions:
fb: <http://rdf.freebase.com/ns/
fbkey: <http://rdf.freebase.com/key/
rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: <http://www.w3.org/2000/01/rdf-schema#
owl: <http://www.w3.org/2002/07/owl#
xsd: <http://www.w3.org/2001/XMLSchema#
foaf: <http://xmlns.com/foaf/0.1/
skos: <http://www.w3.org/2004/02/skos/core#
dct: <http://purl.org/dc/terms/
dc: <http://purl.org/dc/elements/1.1/
prov: <http://www.w3.org/ns/prov#
schema: <http://schema.org/
geo: <http://www.opengis.net/ont/geosparql#
geosparql: <http://www.opengis.net/ont/geosparql#
gn: <http://www.geonames.org/ontology#
bd: <http://www.bigdata.com/rdf#
hint: <http://www.bigdata.com/queryHints#
wikibase: <http://wikiba.se/ontology#
qb: <http://purl.org/linked-data/cube#
void: <http://rdfs.org/ns/void#

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. Use the functions to search for 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. Use the execute function to get feedback on intermediate queries. You can go back and forth between knowledge graph searches and SPARQL query executions to refine the query.
4. Use the answer or cancel function to finalize your answer and stop the generation process.

Additional rules:
1. Explain your thought process before and after each step and function call.
2. Do not assume or make up any entities or properties without verifying them with the knowledge graphs and functions.
3. 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.
4. 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.
5. 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.
6. For questions with a "True" or "False" answer the SPARQL query should be an ASK query.
7. 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.

[User] where did william morris go to college?

[Assistant]
Let's break down the question:

1. The entity is "William Morris".
2. The property we are interested in is "college attended" or "educated at".

First, I will search for the entity "William Morris" in Freebase to get the correct identifier.

[Tool]
Top 10 entity alternatives:
1. William Morris, also known as W. Morris (fb:m.08304): William Morris was an English textile designer, poet, novelist, ...Rossetti, Webb, and others: the Morris, Marshall, Faulkner & Co., has type Author
2. William Morris (fb:m.0h95bpj): William Morris was an American stage and film actor. He began hi... from Kino DVD, is an example of Morris's surviving screen work., has type Theater Actor
3. William Maybelline, also known as William Morris (fb:m.012s3kdx): has type Composer
4. The work of William Morris, also known as William Morris. (fb:m.0829b1b): has type Book Edition
5. William Morris (fb:m.0cm8gc2): William Morris, is an American sports shooter and was an officer...USA in 40 years. He is a graduate of the University of Oklahoma., has type Olympic athlete
6. William Morris (fb:m.0c70fk_): has type Book Edition
7. William Morris (fb:m.0k4vyn3): William Morris is an actor., has type Film actor
8. William Morris, also known as Rhosynnog (fb:m.0_h07sd): William Morris, widely known by his bardic name, Rhosynnog was t...erica and was awarded an honorary degree by Bucknell University., has type Religious Leader
9. Bill Morris, also known as William A. Morris, William Morris, Bill Morris (fb:m.0rprwd1): William A. Morris is a television editor., Bill Morris is a TV editor., has type Award Nominee
10. William R. Morris, also known as William Morris (fb:m.03ql75r): William Russell Morris CMG ISO was the second Public Service Com...and the CMG in 1919. He married Edith Miranda Mountfoot in 1877., has type Politician

[Assistant]
The most likely entity for the famous English designer, poet, and novelist William Morris is fb:m.08304.

Next, I need to find the property in Freebase that corresponds to "college attended" or "educated at". I will search for properties related to "education" for this entity.

[Tool]
Top 10 property alternatives:
1. Education (fb:people.person.education): links to type Education, part of Person schema
2. Projects (fb:projects.project_participant.projects): links to type Project participation, part of Project participant schema
3. School or Movement (fb:book.author.school_or_movement): links to type Literary School Or Movement, part of Author schema
4. Disciplines (fb:base.kwebbase.kwtopic.disciplines): part of KWTopic schema, links to type Text
5. Article (fb:common.topic.article): links to type Document, part of Topic schema
6. Assessment (fb:base.kwebbase.kwtopic.assessment): part of KWTopic schema, links to type Text
7. Profession (fb:people.person.profession): links to type Profession, part of Person schema
8. Connections to (fb:base.kwebbase.kwtopic.connections_to): links to type KWConnection, part of KWTopic schema
9. Parents (fb:people.person.parents): part of Person schema, links to type Person
10. Description (fb:common.topic.description): part of Topic schema, links to type Text

No other items found

[Assistant]
The property fb:people.person.education is the most relevant for "education" or "college attended" for William Morris.

Now, I will list the values for this property for the entity fb:m.08304 (William Morris) to find out where he went to college.

[Tool]
Got 3 rows and 3 columns:
| subject                     | property                               | object       |
| --------------------------- | -------------------------------------- | ------------ |
| William Morris (fb:m.08304) | Education (fb:people.person.education) | fb:m.02wmrt8 |
| William Morris (fb:m.08304) | Education (fb:people.person.education) | fb:m.04q1gj3 |
| William Morris (fb:m.08304) | Education (fb:people.person.education) | fb:m.0n1jtn3 |

[Assistant] William Morris has three education-related entities linked to him. To determine which (if any) are colleges, I will retrieve the labels for these entities: fb:m.02wmrt8, fb:m.04q1gj3, and fb:m.0n1jtn3.

[Tool]
Got 4 rows and 3 columns:
| subject      | property                                         | object                              |
| ------------ | ------------------------------------------------ | ----------------------------------- |
| fb:m.02wmrt8 | Type (fb:type.object.type)                       | Education (fb:education.education)  |
| fb:m.02wmrt8 | Institution (fb:education.education.institution) | Exeter College, Oxford (fb:m.0ylvj) |
| fb:m.02wmrt8 | Student (fb:education.education.student)         | William Morris (fb:m.08304)         |
| fb:m.02wmrt8 | rdf:type                                         | Education (fb:education.education)  |

[Tool]
Got 4 rows and 3 columns:
| subject      | property                                         | object                             |
| ------------ | ------------------------------------------------ | ---------------------------------- |
| fb:m.04q1gj3 | Type (fb:type.object.type)                       | Education (fb:education.education) |
| fb:m.04q1gj3 | Institution (fb:education.education.institution) | Marlborough College (fb:m.0173s9)  |
| fb:m.04q1gj3 | Student (fb:education.education.student)         | William Morris (fb:m.08304)        |
| fb:m.04q1gj3 | rdf:type                                         | Education (fb:education.education) |

[Tool]
Got 4 rows and 3 columns:
| subject      | property                                         | object                             |
| ------------ | ------------------------------------------------ | ---------------------------------- |
| fb:m.0n1jtn3 | Type (fb:type.object.type)                       | Education (fb:education.education) |
| fb:m.0n1jtn3 | Institution (fb:education.education.institution) | University of Oxford (fb:m.07tgn)  |
| fb:m.0n1jtn3 | Student (fb:education.education.student)         | William Morris (fb:m.08304)        |
| fb:m.0n1jtn3 | rdf:type                                         | Education (fb:education.education) |

[Tool]
Got 551 rows and 3 columns, showing the first 10 rows below:
| subject                             | property                                                            | object                                                                   |
| ----------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| Exeter College, Oxford (fb:m.0ylvj) | Type (fb:type.object.type)                                          | Topic (fb:common.topic)                                                  |
| Exeter College, Oxford (fb:m.0ylvj) | Key (fb:type.object.key)                                            | /en/exeter_college_oxford                                                |
| Exeter College, Oxford (fb:m.0ylvj) | Name (fb:type.object.name)                                          | Collège d'Exeter (fr)                                                    |
| Exeter College, Oxford (fb:m.0ylvj) | Topic equivalent webpage (fb:common.topic.topic_equivalent_webpage) | <http://de.wikipedia.org/wiki/Exeter_College>                            |
| Exeter College, Oxford (fb:m.0ylvj) | Notable for (fb:common.topic.notable_for)                           | fb:g.125bwxt4z                                                           |
| Exeter College, Oxford (fb:m.0ylvj) | Notable types (fb:common.topic.notable_types)                       | College/University (fb:m.01y2hnl)                                        |
| Exeter College, Oxford (fb:m.0ylvj) | Description (fb:common.topic.description)                           | Das Exeter College ist eines der...Colleges der Universität Oxford. (de) |
| Exeter College, Oxford (fb:m.0ylvj) | Article (fb:common.topic.article)                                   | fb:m.0ylvr                                                               |
| Exeter College, Oxford (fb:m.0ylvj) | Also known as (fb:common.topic.alias)                               | The Rector and Scholars of Exete...lege in the University of Oxford (en) |
| Exeter College, Oxford (fb:m.0ylvj) | Has value (fb:freebase.valuenotation.has_value)                     | Acceptance rate (fb:m.0h5tmrv)                                           |
| ...                                 | ...                                                                 | ...                                                                      |

[Tool]
Got 531 rows and 3 columns, showing the first 10 rows below:
| subject                           | property                                                            | object                                                                   |
| --------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| Marlborough College (fb:m.0173s9) | Type (fb:type.object.type)                                          | Topic (fb:common.topic)                                                  |
| Marlborough College (fb:m.0173s9) | Key (fb:type.object.key)                                            | /en/marlborough_college                                                  |
| Marlborough College (fb:m.0173s9) | Name (fb:type.object.name)                                          | Marlborough College (cs)                                                 |
| Marlborough College (fb:m.0173s9) | Topic equivalent webpage (fb:common.topic.topic_equivalent_webpage) | <http://cs.wikipedia.org/wiki/index.html?curid=187004>                   |
| Marlborough College (fb:m.0173s9) | Notable for (fb:common.topic.notable_for)                           | fb:g.1256x4xy8                                                           |
| Marlborough College (fb:m.0173s9) | Notable types (fb:common.topic.notable_types)                       | Educational Institution (fb:m.04lw)                                      |
| Marlborough College (fb:m.0173s9) | Description (fb:common.topic.description)                           | Il Marlborough College è una scu...descriveva la vita della scuola. (it) |
| Marlborough College (fb:m.0173s9) | Article (fb:common.topic.article)                                   | fb:m.0173sg                                                              |
| Marlborough College (fb:m.0173s9) | Also known as (fb:common.topic.alias)                               | Marlborough College, main campus (en)                                    |
| Marlborough College (fb:m.0173s9) | Contained by (fb:location.location.containedby)                     | United Kingdom (fb:m.07ssc)                                              |
| ...                               | ...                                                                 | ...                                                                      |

[Tool]
Got 5,276 rows and 3 columns, showing the first 10 rows below:
| subject                           | property                                                            | object                                                                   |
| --------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| University of Oxford (fb:m.07tgn) | Type (fb:type.object.type)                                          | Topic (fb:common.topic)                                                  |
| University of Oxford (fb:m.07tgn) | Key (fb:type.object.key)                                            | /base/ranker/rankerurlname/university-of-oxford$002F2307743              |
| University of Oxford (fb:m.07tgn) | Name (fb:type.object.name)                                          | Đại học Oxford (vi)                                                      |
| University of Oxford (fb:m.07tgn) | Topic equivalent webpage (fb:common.topic.topic_equivalent_webpage) | <http://ar.wikipedia.org/wiki/%2C%27%45%39%29_%23%48%43%33%41%48%31%2F>  |
| University of Oxford (fb:m.07tgn) | Notable for (fb:common.topic.notable_for)                           | fb:g.1254xj7k6                                                           |
| University of Oxford (fb:m.07tgn) | Notable types (fb:common.topic.notable_types)                       | College/University (fb:m.01y2hnl)                                        |
| University of Oxford (fb:m.07tgn) | Description (fb:common.topic.description)                           | A Universidade de Oxford, situad.... Também faz parte do Europaeum. (pt) |
| University of Oxford (fb:m.07tgn) | Article (fb:common.topic.article)                                   | fb:m.07tgz                                                               |
| University of Oxford (fb:m.07tgn) | Also known as (fb:common.topic.alias)                               | Oxford (tr)                                                              |
| University of Oxford (fb:m.07tgn) | Has value (fb:freebase.valuenotation.has_value)                     | Local tuition (fb:m.0h5tn0c)                                             |
| ...                               | ...                                                                 | ...                                                                      |

[Assistant]
Based on the data, William Morris attended:
- Exeter College, Oxford (fb:m.0ylvj)
- Marlborough College (fb:m.0173s9)
- University of Oxford (fb:m.07tgn)

Of these, Exeter College is a constituent college of the University of Oxford, and Marlborough College is a secondary school.

To answer the question "where did William Morris go to college?", the relevant answer is Exeter College, Oxford, and University of Oxford.

I will now write a SPARQL query that returns the IRIs of the colleges William Morris attended, along with their labels if available.

[Tool] Stopped generation process

[User]
Feedback (status=retry):
The SPARQL query did not return any results, even though the answer claims William Morris attended Exeter College, Oxford. The query is too restrictive because it filters for colleges of type fb:m.01y2hnl (College/University), which may not be necessary or may not match the data structure in Freebase. Additionally, the query should not rely on label retrieval unless explicitly requested. Please revise the query to remove unnecessary type constraints and ensure it retrieves the actual institution(s) William Morris attended, returning their IRIs. Also, verify that the entity IDs used are correct and present in the knowledge graph.

[Assistant]
Thank you for the feedback. I understand that the previous query was too restrictive due to the type constraint and unnecessary label retrieval. I will revise the query to simply retrieve the IRIs of the institutions William Morris attended, based on the education property, without filtering by type or retrieving labels.

Here is my revised approach:
- Use the entity fb:m.08304 for William Morris.
- Use the property fb:people.person.education to get his education records.
- For each education record, retrieve the institution via fb:education.education.institution.
- Return only the institution IRIs.

Here is the revised SPARQL query.

[Tool] Stopped generation process

[User]
Feedback (status=done):
The SPARQL query correctly retrieves the IRIs of the educational institutions attended by William Morris, following the requirement to return identifiers. The answer is complete and accurate, listing all relevant institutions. No further refinement is necessary.


PREFIX fb: <http://rdf.freebase.com/ns/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?actor ?actorLabel WHERE {
  ?performance a fb:tv.regular_tv_appearance ; fb:tv.regular_tv_appearance.character fb:m.0f22p8 ; fb:tv.regular_tv_appearance.series fb:m.01b64v ; fb:tv.regular_tv_appearance.actor ?actor .
  OPTIONAL {
    ?actor rdfs:label ?actorLabel
  }
}

Got 8 rows and 2 columns:
| actor                       | actorLabel         |
| --------------------------- | ------------------ |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (en) |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (fi) |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (fr) |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (nl) |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (pl) |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (ro) |
| Joshua Morrow (fb:m.07sklj) | Joshua Morrow (sv) |
| Joshua Morrow (fb:m.07sklj) | Джошуа Морроу (ru) |

Joshua Morrow (fb:m.07sklj) plays Nicholas Newman on The Young and the Restless.

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

You have access to the following knowledge graphs:
freebase at http://galera:7002

You can use the following SPARQL prefixes implicitly in all functions:
fb: <http://rdf.freebase.com/ns/
fbkey: <http://rdf.freebase.com/key/
rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: <http://www.w3.org/2000/01/rdf-schema#
owl: <http://www.w3.org/2002/07/owl#
xsd: <http://www.w3.org/2001/XMLSchema#
foaf: <http://xmlns.com/foaf/0.1/
skos: <http://www.w3.org/2004/02/skos/core#
dct: <http://purl.org/dc/terms/
dc: <http://purl.org/dc/elements/1.1/
prov: <http://www.w3.org/ns/prov#
schema: <http://schema.org/
geo: <http://www.opengis.net/ont/geosparql#
geosparql: <http://www.opengis.net/ont/geosparql#
gn: <http://www.geonames.org/ontology#
bd: <http://www.bigdata.com/rdf#
hint: <http://www.bigdata.com/queryHints#
wikibase: <http://wikiba.se/ontology#
qb: <http://purl.org/linked-data/cube#
void: <http://rdfs.org/ns/void#

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. Use the functions to search for 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. Use the execute function to get feedback on intermediate queries. You can go back and forth between knowledge graph searches and SPARQL query executions to refine the query.
4. Use the answer or cancel function to finalize your answer and stop the generation process.

Additional rules:
1. Explain your thought process before and after each step and function call.
2. Do not assume or make up any entities or properties without verifying them with the knowledge graphs and functions.
3. 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.
4. 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.
5. 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.
6. For questions with a "True" or "False" answer the SPARQL query should be an ASK query.
7. 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.

[User] who plays nicholas newman on the young and the restless?

[Assistant]
Let's break down the question:

1. The user is asking for the actor who plays the character "Nicholas Newman" on the TV show "The Young and the Restless".
2. We need to identify:
   - The entity for "Nicholas Newman" (the character).
   - The entity for "The Young and the Restless" (the TV show).
   - The property that links a character to the actor who portrays them.

Step 1: Search for the entity "Nicholas Newman" in Freebase.

[Tool]
Top 10 entity alternatives:
1. Nicholas Newman (fb:m.0f22p8): Nicholas "Nick" Christian Newman is a fictional character from t... of another woman, Phyllis Summers, which resulted in an affair., has type TV Character
2. Nicholas Newman (fb:m.0h3vl_1): Nicholas Newman is a Paralympian athlete from South Africa compe...third when attempting to defend his title in the F36/38 javelin., has type Person
3. Nicholas Newman (fb:m.0w70cfb): Sharon Newman is the father of Hunter Allan., has type Person
4. Nicholas Newman (fb:m.0qb5mbr)
5. Nick Newman, also known as John Nicholas Newman (fb:m.04n4p6l): John Nicholas "Nick" Newman is an American naval architect noted... of Naval Architecture at Massachusetts Institute of Technology., has type Academic
6. Newman, Nicholas (Fictitious character) (fb:m.0bpzq69)
7. Newman, also known as Newman, California, Stanislaus County / Newman city (fb:m.0r7g9): Newman is a city in Stanislaus County, California, United States...establish the sphere of influence boundary lasting for 25 years., has type City/Town/Village
8. Newman, also known as Douglas County / Newman city, Newman, Illinois (fb:m.0s685): Newman is a city in Douglas County, Illinois, United States. The...street is Broadway. The children go to school at Shiloh CUSD #1., has type City/Town/Village
9. David Baddiel, also known as Baddiel, David, David Lionel Baddiel, Newman (fb:m.0216w1): David Lionel Baddiel is an English comedian, novelist and televi...comedy, Baddiel is also a published novelist and a screenwriter., has type TV Personality
10. Nicholas of Lyra, also known as Nicholas (fb:m.03z4z5): Nicholas of Lyra, or Nicolaus Lyranus, a Franciscan teacher, was...ed and elaborated readings being given to Scripture in his time., has type Author

[Assistant]
The most relevant entity for "Nicholas Newman" as a TV character is fb:m.0f22p8.

Next, we need to confirm that this character is from "The Young and the Restless" and find the property that links the character to the actor who portrays them.

Step 2: Search for properties of the entity fb:m.0f22p8 related to "actor" or "portrayed by".

[Tool]
Top 10 property alternatives:
1. Occupation (fb:fictional_universe.fictional_character.occupation): part of Fictional Character schema, links to type Character Occupation
2. Character Created By (fb:fictional_universe.fictional_character.character_created_by): links to type Fictional Character Creator, part of Fictional Character schema
3. Name (fb:type.object.name): part of Object schema, links to type Text
4. Romantically involved with (fb:fictional_universe.fictional_character.romantically_involved_with): links to type Romantic involvement, part of Fictional Character schema
5. Programs in which this was a regular character (fb:tv.tv_character.appeared_in_tv_program): links to type TV Regular Performance, part of TV Character schema
6. Key (fb:type.object.key): part of Object schema, links to type Key
7. Married To (fb:fictional_universe.fictional_character.married_to): links to type Marriage (of Fictional Characters), part of Fictional Character schema
8. Type (fb:type.object.type): part of Object schema, links to type Type
9. Gender (fb:fictional_universe.fictional_character.gender): part of Fictional Character schema, links to type Character Gender
10. Notable for (fb:common.topic.notable_for): links to type notable_for, part of Topic schema

No other items found

[Assistant]
There is no direct property labeled "actor" or "portrayed by" for the character entity. However, there is a property "Programs in which this was a regular character" (fb:tv.tv_character.appeared_in_tv_program), which links to a type "TV Regular Performance".

Step 3: Let's list the triples for the property fb:tv.tv_character.appeared_in_tv_program for the character fb:m.0f22p8 to see what information is available, such as the actor who played the character.

[Tool]
Got 1 row and 3 columns:
| subject                       | property                                                                                | object       |
| ----------------------------- | ------------------------------------------------------------------------------------------ | ------------ |
| Nicholas Newman (fb:m.0f22p8) | Programs in which this was a regular character (fb:tv.tv_character.appeared_in_tv_program) | fb:m.0bw1ttt |

[Assistant]
The object linked is fb:m.0bw1ttt, which is likely a "TV Regular Performance" entity. This entity should contain information about the actor and the TV program.

Step 4: Let's list the properties of fb:m.0bw1ttt to find the actor and the TV show.

[Tool]
Got 5 rows and 3 columns:
| subject      | property                                          | object                                               |
| ------------ | ------------------------------------------------- | ---------------------------------------------------- |
| fb:m.0bw1ttt | Type (fb:type.object.type)                        | TV Regular Performance (fb:tv.regular_tv_appearance) |
| fb:m.0bw1ttt | Actor (fb:tv.regular_tv_appearance.actor)         | Joshua Morrow (fb:m.07sklj)                          |
| fb:m.0bw1ttt | Series (fb:tv.regular_tv_appearance.series)       | The Young and the Restless (fb:m.01b64v)             |
| fb:m.0bw1ttt | Character (fb:tv.regular_tv_appearance.character) | Nicholas Newman (fb:m.0f22p8)                        |
| fb:m.0bw1ttt | rdf:type                                          | TV Regular Performance (fb:tv.regular_tv_appearance) |

[Assistant]
From the properties of the TV Regular Performance entity (fb:m.0bw1ttt), we see:

- Actor: Joshua Morrow (fb:m.07sklj)
- Series: The Young and the Restless (fb:m.01b64v)
- Character: Nicholas Newman (fb:m.0f22p8)

This confirms that Joshua Morrow plays Nicholas Newman on The Young and the Restless.

Now, I will write a SPARQL query that returns the actor(s) (with their IRIs and optionally their labels) who play Nicholas Newman on The Young and the Restless.

[Tool] Stopped generation process

[User]
Feedback (status=done):
The SPARQL query correctly identifies the actor who plays Nicholas Newman on The Young and the Restless by linking the character, series, and actor through the appropriate properties. The query returns the actor's IRI and optionally retrieves labels in various languages, which is acceptable. The answer provided is accurate and complete based on the query result. No further refinement is needed.


PREFIX fb: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?actor WHERE {
  fb:m.04q78 fb:film.film_character.portrayed_in_films ?performance .
  ?performance fb:film.performance.actor ?actor .
}

Got 9 rows and 1 column:
| actor                          |
| ------------------------------ |
| James Marsters (fb:m.01f9mq)   |
| Powers Boothe (fb:m.02p7_k)    |
| Anthony LaPaglia (fb:m.0301bq) |
| Gene Hackman (fb:m.039bp)      |
| Clancy Brown (fb:m.03wy70)     |
| Kevin Spacey (fb:m.048lv)      |
| Chris Noth (fb:m.04cf09)       |
| Jesse Eisenberg (fb:m.057176)  |
| William Hootkins (fb:m.079jd_) |

Many actors have played Lex Luthor in films, including James Marsters and William Hootkins, among others. The query returns the IRIs of all such actors.

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

You have access to the following knowledge graphs:
freebase at http://galera:7002

You can use the following SPARQL prefixes implicitly in all functions:
fb: <http://rdf.freebase.com/ns/
fbkey: <http://rdf.freebase.com/key/
rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: <http://www.w3.org/2000/01/rdf-schema#
owl: <http://www.w3.org/2002/07/owl#
xsd: <http://www.w3.org/2001/XMLSchema#
foaf: <http://xmlns.com/foaf/0.1/
skos: <http://www.w3.org/2004/02/skos/core#
dct: <http://purl.org/dc/terms/
dc: <http://purl.org/dc/elements/1.1/
prov: <http://www.w3.org/ns/prov#
schema: <http://schema.org/
geo: <http://www.opengis.net/ont/geosparql#
geosparql: <http://www.opengis.net/ont/geosparql#
gn: <http://www.geonames.org/ontology#
bd: <http://www.bigdata.com/rdf#
hint: <http://www.bigdata.com/queryHints#
wikibase: <http://wikiba.se/ontology#
qb: <http://purl.org/linked-data/cube#
void: <http://rdfs.org/ns/void#

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. Use the functions to search for 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. Use the execute function to get feedback on intermediate queries. You can go back and forth between knowledge graph searches and SPARQL query executions to refine the query.
4. Use the answer or cancel function to finalize your answer and stop the generation process.

Additional rules:
1. Explain your thought process before and after each step and function call.
2. Do not assume or make up any entities or properties without verifying them with the knowledge graphs and functions.
3. 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.
4. 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.
5. 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.
6. For questions with a "True" or "False" answer the SPARQL query should be an ASK query.
7. 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.

[User] who has played lex luthor?

[Assistant]
Let's break down the question:

1. The user wants to know which actors have played the character "Lex Luthor".
2. We need to identify the entity for "Lex Luthor" in Freebase.
3. Then, we need to find properties that link actors to the roles/characters they have played, specifically for Lex Luthor.

First, I will search for the entity "Lex Luthor" in Freebase.

[Tool]
Top 10 entity alternatives:
1. Alexander Luthor, also known as Alexander Luthor, President Lex Luthor, Lex Luthor (fb:m.04q78): Alexander Joseph "Lex" Luthor is a fictional supervillain appear...Corp, with Mercy Graves as his personal assistant and bodyguard., Lex Luthor is a fictional character from the television series S... things connected to Clark ultimately destroys their friendship., has type Comic Book Character
2. Lex Luthor (fb:m.0sl38_7): has type Musical Artist
3. Lex Luthor (fb:m.012b25n): has type Musical Recording
4. Lex Luthor (fb:m.01c123m): has type Musical Recording
5. Lex Luthor (fb:g.11b822fr50)
6. Lex Luthor (fb:g.11b824cjmm)
7. Lex Luthor (fb:m.0l950f9)
8. Lex Luthor (fb:m.0lncb_5)
9. Lex Luthorz, also known as Soul Villain, Isaac Calderón Español (fb:m.0nhwkpc): has type Composer
10. Lex Luthor's Lair (fb:m.0dvckph): has type Musical Recording

[Assistant]
The most relevant entity for the character "Lex Luthor" is "Alexander Luthor" (fb:m.04q78), which is described as the fictional supervillain from DC Comics.

Next, I need to find the property that links actors to the roles/characters they have played. I will search for properties related to "actor" or "portrayed by" for this entity.

[Tool]
Top 10 property alternatives:
1. Occupation (fb:fictional_universe.fictional_character.occupation): part of Fictional Character schema, links to type Character Occupation
2. Appeared In TV Episodes (fb:tv.tv_character.appeared_in_tv_episodes): links to type TV episode performance, part of TV Character schema
3. Portrayed in films (fb:film.film_character.portrayed_in_films): links to type Film performance, part of Film character schema
4. First TV appearance (fb:tv.tv_character.first_tv_appearance): part of TV Character schema, links to type TV Episode
5. Character Created By (fb:fictional_universe.fictional_character.character_created_by): links to type Fictional Character Creator, part of Fictional Character schema
6. Name (fb:type.object.name): part of Object schema, links to type Text
7. Regular Featured Appearances (fb:comic_books.comic_book_character.regular_featured_appearances): part of Comic Book Character schema, links to type Comic Book Series
8. Romantically involved with (fb:fictional_universe.fictional_character.romantically_involved_with): links to type Romantic involvement, part of Fictional Character schema
9. Programs in which this was a regular character (fb:tv.tv_character.appeared_in_tv_program): links to type TV Regular Performance, part of TV Character schema
10. Key (fb:type.object.key): part of Object schema, links to type Key

No other items found

[Assistant]
The most relevant property for finding actors who played Lex Luthor is "Portrayed in films" (fb:film.film_character.portrayed_in_films), which links to film performances. These performances should have information about the actor.

Next, I will list some triples where the subject is Lex Luthor (fb:m.04q78) and the property is "portrayed in films" to see the structure and find the actor information.

[Tool]
Got 13 rows and 3 columns, showing the first 10 rows below:
| subject                       | property                                                       | object       |
| ----------------------------- | -------------------------------------------------------------- | ------------ |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.02vb45j |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.02vbrr0 |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.03jr1qh |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.04j2wpn |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.06wj_km |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.07ss97y |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.0_gg6qk |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.0gm218k |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.0gw041n |
| Alexander Luthor (fb:m.04q78) | Portrayed in films (fb:film.film_character.portrayed_in_films) | fb:m.0k3z0y  |
| ...                           | ...                                                            | ...          |

[Assistant]
Each object (e.g., fb:m.02vb45j) represents a film performance where Lex Luthor was portrayed. To find the actors, I need to look up the properties of these film performance entities, specifically to find the actor involved.

I will now search for properties of one of these film performance entities (e.g., fb:m.02vb45j) with the query "actor" to identify the property that links to the actor.

[Tool]
Top 10 property alternatives:
1. Actor (fb:film.performance.actor): part of Film performance schema, links to type Film actor
2. Character (fb:film.performance.character): part of Film performance schema, links to type Film character
3. Film (fb:film.performance.film): part of Film performance schema, links to type Film
4. Type (fb:type.object.type): part of Object schema, links to type Type
5. Special Performance Type (fb:film.performance.special_performance_type): links to type Special film performance type, part of Film performance schema

No other items found

[Assistant]
The property "Actor" (fb:film.performance.actor) is the one that links a film performance to the actor who played the role.

Now, I will write a SPARQL query that:
- Starts from the Lex Luthor entity (fb:m.04q78)
- Follows the "portrayed in films" property to film performance entities
- Follows the "actor" property from those performances to the actors
- Optionally retrieves the actor's label (name)

Let's construct and execute this query.

[Tool]
Got 237 rows and 2 columns, showing the first 5 and last 5 rows below:
| actor                          | actorLabel            |
| ------------------------------ | --------------------- |
| James Marsters (fb:m.01f9mq)   | James Marsters (cs)   |
| James Marsters (fb:m.01f9mq)   | James Marsters (da)   |
| James Marsters (fb:m.01f9mq)   | James Marsters (de)   |
| James Marsters (fb:m.01f9mq)   | James Marsters (en)   |
| James Marsters (fb:m.01f9mq)   | James Marsters (es)   |
| ...                            | ...                   |
| William Hootkins (fb:m.079jd_) | William Hootkins (hu) |
| William Hootkins (fb:m.079jd_) | William Hootkins (it) |
| William Hootkins (fb:m.079jd_) | William Hootkins (nl) |
| William Hootkins (fb:m.079jd_) | William Hootkins (pl) |
| William Hootkins (fb:m.079jd_) | William Hootkins (tr) |

[Tool] Stopped generation process

[User]
Feedback (status=done):
The SPARQL query correctly retrieves all actors who have portrayed Lex Luthor by following the appropriate relationships in the Freebase schema. The answer is accurate, and the query returns the IRIs of the actors as required. No further refinement is necessary.