Piet Keizer
E451646
Piet Keizer was a renowned Dutch footballer, best known as a skillful left winger for Ajax and the Netherlands national team during the late 1960s and early 1970s.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Piet Keizer canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4528827 — 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: Piet Keizer Context triple: [Piet, hasNotableBearer, Piet Keizer]
-
A.
Piet de Jong
Piet de Jong was a Dutch politician who served as Prime Minister of the Netherlands from 1967 to 1971.
-
B.
Koos Vorrink
Koos Vorrink was a prominent Dutch social-democratic politician and trade union leader who played a key role in shaping the modern Labour Party (PvdA) in the Netherlands.
-
C.
Hans van Heeswijk
Hans van Heeswijk is a Dutch architect known for designing prominent cultural buildings, including major expansions and renovations of museums in the Netherlands.
-
D.
Gerrit Zalm
Gerrit Zalm is a Dutch economist and politician who served as the Netherlands’ long-serving Minister of Finance and later as Deputy Prime Minister.
-
E.
Bep Voskuijl
Bep Voskuijl was a Dutch office worker who helped hide Anne Frank and her family during World War II by providing food, supplies, and support to those in the Secret Annex.
- 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: Piet Keizer Target entity description: Piet Keizer was a renowned Dutch footballer, best known as a skillful left winger for Ajax and the Netherlands national team during the late 1960s and early 1970s.
-
A.
Piet de Jong
Piet de Jong was a Dutch politician who served as Prime Minister of the Netherlands from 1967 to 1971.
-
B.
Koos Vorrink
Koos Vorrink was a prominent Dutch social-democratic politician and trade union leader who played a key role in shaping the modern Labour Party (PvdA) in the Netherlands.
-
C.
Hans van Heeswijk
Hans van Heeswijk is a Dutch architect known for designing prominent cultural buildings, including major expansions and renovations of museums in the Netherlands.
-
D.
Gerrit Zalm
Gerrit Zalm is a Dutch economist and politician who served as the Netherlands’ long-serving Minister of Finance and later as Deputy Prime Minister.
-
E.
Bep Voskuijl
Bep Voskuijl was a Dutch office worker who helped hide Anne Frank and her family during World War II by providing food, supplies, and support to those in the Secret Annex.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
association football player
ⓘ
human ⓘ |
| awardReceived |
Eredivisie champion
ⓘ
European Cup winner ⓘ Intercontinental Cup winner ⓘ KNVB Cup winner NERFINISHED ⓘ |
| causeOfDeath | lung cancer ⓘ |
| countryOfCitizenship | Netherlands ⓘ |
| dateOfBirth | 1943-06-14 ⓘ |
| dateOfDeath | 2017-02-10 ⓘ |
| familyName | Keizer NERFINISHED ⓘ |
| fullName | Petrus Johannes Keizer NERFINISHED ⓘ |
| givenName | Petrus NERFINISHED ⓘ |
| knownFor |
being one of Ajax’s greatest wingers
ⓘ
dribbling ability ⓘ technical skill ⓘ |
| languageSpoken | Dutch ⓘ |
| memberOfSportsTeam |
AFC Ajax
NERFINISHED
ⓘ
Netherlands national football team NERFINISHED ⓘ SC Telstar NERFINISHED ⓘ |
| nationality | Dutch ⓘ |
| notableCoach |
Rinus Michels
NERFINISHED
ⓘ
Stefan Kovacs NERFINISHED ⓘ |
| notableTeammate | Johan Cruyff NERFINISHED ⓘ |
| notableWork | Total Football era at Ajax NERFINISHED ⓘ |
| numberOfAppearancesForClub | over 300 for Ajax ⓘ |
| participantIn |
Eredivisie
NERFINISHED
ⓘ
European Cup NERFINISHED ⓘ FIFA World Cup qualifiers NERFINISHED ⓘ Intercontinental Cup (football) NERFINISHED ⓘ UEFA European Championship qualifiers NERFINISHED ⓘ |
| placeOfBirth |
Amsterdam
NERFINISHED
ⓘ
Netherlands NERFINISHED ⓘ North Holland NERFINISHED ⓘ |
| placeOfDeath |
Amsterdam
NERFINISHED
ⓘ
Netherlands NERFINISHED ⓘ North Holland NERFINISHED ⓘ |
| placeOfSportsActivity |
Amsterdam
NERFINISHED
ⓘ
Netherlands NERFINISHED ⓘ |
| playedForClubFrom | AFC Ajax, 1961 ⓘ |
| playedForClubUntil | AFC Ajax, 1974 ⓘ |
| playedForNationalTeamFrom | Netherlands, 1962 ⓘ |
| playedForNationalTeamUntil | Netherlands, 1974 ⓘ |
| positionPlayed |
left winger
ⓘ
winger ⓘ |
| sexOrGender | male ⓘ |
| sport | association football ⓘ |
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: Piet Keizer Description of subject: Piet Keizer was a renowned Dutch footballer, best known as a skillful left winger for Ajax and the Netherlands national team during the late 1960s and early 1970s.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.