Volkert van der Graaf
E425327
Volkert van der Graaf is a Dutch environmental and animal-rights activist best known as the assassin of politician Pim Fortuyn in 2002.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Volkert van der Graaf canonical | 2 |
| van der Graaf | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4243096 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Volkert van der Graaf Context triple: [Pim Fortuyn, killedBy, Volkert van der Graaf]
-
A.
Thom de Graaf
Thom de Graaf is a Dutch politician and former Deputy Prime Minister known for his long-standing role in the social-liberal Democrats 66 (D66) party and his leadership in various high-level governmental and administrative positions in the Netherlands.
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B.
Willem van der Vliet
Willem van der Vliet was a Dutch Golden Age painter from Delft, known for his portraits and history paintings and as an early mentor to his nephew Hendrick Cornelisz. van Vliet.
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C.
Henri Bontenbal
Henri Bontenbal is a Dutch politician who serves as the leader of the Christian Democratic Appeal (CDA) and is known for his focus on energy and climate policy.
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D.
Jan van der Vliet
Jan van der Vliet was a Dutch artist associated with the Delft painters’ Guild of Saint Luke during the Dutch Golden Age.
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E.
Joost Vos
Joost Vos is a Dutch architect best known as a leading partner at the renowned architecture firm Benthem Crouwel Architekten, contributing to major public and infrastructural projects.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Volkert van der Graaf Target entity description: Volkert van der Graaf is a Dutch environmental and animal-rights activist best known as the assassin of politician Pim Fortuyn in 2002.
-
A.
Thom de Graaf
Thom de Graaf is a Dutch politician and former Deputy Prime Minister known for his long-standing role in the social-liberal Democrats 66 (D66) party and his leadership in various high-level governmental and administrative positions in the Netherlands.
-
B.
Willem van der Vliet
Willem van der Vliet was a Dutch Golden Age painter from Delft, known for his portraits and history paintings and as an early mentor to his nephew Hendrick Cornelisz. van Vliet.
-
C.
Henri Bontenbal
Henri Bontenbal is a Dutch politician who serves as the leader of the Christian Democratic Appeal (CDA) and is known for his focus on energy and climate policy.
-
D.
Jan van der Vliet
Jan van der Vliet was a Dutch artist associated with the Delft painters’ Guild of Saint Luke during the Dutch Golden Age.
-
E.
Joost Vos
Joost Vos is a Dutch architect best known as a leading partner at the renowned architecture firm Benthem Crouwel Architekten, contributing to major public and infrastructural projects.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf |
Dutch person
ⓘ
animal rights activist ⓘ assassin ⓘ environmental activist ⓘ human ⓘ |
| areaOfActivism |
animal welfare
ⓘ
environmental protection ⓘ |
| convictedOf | murder of Pim Fortuyn ⓘ |
| countryOfCitizenship | Netherlands ⓘ |
| countryOfCrime | Netherlands ⓘ |
| dateOfCrime | 2002 ⓘ |
| familyName |
van der Graaf
ⓘ
linked to:
Volkert van der Graaf
|
| givenName | Volkert ⓘ |
| languageSpoken | Dutch ⓘ |
| legalStatus |
convicted murderer
ⓘ
former prisoner ⓘ |
| methodOfKilling | firearm ⓘ |
| motive |
concern for vulnerable groups
ⓘ
opposition to Pim Fortuyn's political views ⓘ |
| movement |
animal rights movement
ⓘ
environmentalism ⓘ |
| name | Volkert van der Graaf ⓘ |
| nationality | Dutch ⓘ |
| notableEvent |
arrest after assassination of Pim Fortuyn
ⓘ
trial for the murder of Pim Fortuyn ⓘ |
| notableFor |
Dutch animal rights activism
ⓘ
assassination of Pim Fortuyn ⓘ |
| occupation | activist ⓘ |
| perpetratorOf | assassination of Pim Fortuyn ⓘ |
| placeOfBirth | Netherlands ⓘ |
| placeOfCrime | Hilversum ⓘ |
| politicalContext | Dutch general election of 2002 ⓘ |
| sexOrGender | male ⓘ |
| victimOfCrime | Pim Fortuyn ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Volkert van der Graaf Description of subject: Volkert van der Graaf is a Dutch environmental and animal-rights activist best known as the assassin of politician Pim Fortuyn in 2002.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Volkert van der Graaf