Old Fort Prison complex
E125164
The Old Fort Prison complex is a historic Johannesburg jail, notorious for incarcerating anti-apartheid activists including Nelson Mandela and Mahatma Gandhi, now incorporated into the Constitutional Court precinct as a memorial site.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Old Fort Prison | 1 |
| Old Fort Prison complex canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1082253 — 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: Old Fort Prison complex Context triple: [Constitutional Court of South Africa, buildingPreviouslyUsedAs, Old Fort Prison complex]
-
A.
Lincoln Prison
Lincoln Prison is a correctional facility located in the city of Lincoln in Lincolnshire, England.
-
B.
Kingston Penitentiary (historic)
Kingston Penitentiary (historic) is a former maximum-security federal prison in Kingston, Ontario, renowned as one of Canada’s oldest and most notorious correctional institutions.
-
C.
Blackwell's Island
Blackwell's Island, now known as Roosevelt Island, is a narrow island in New York City's East River historically associated with hospitals, asylums, and prisons.
-
D.
Eastern State Penitentiary
Eastern State Penitentiary is a historic former prison in Philadelphia, Pennsylvania, renowned for its revolutionary radial design and as one of the most famous and expensive prisons of the 19th century.
-
E.
Fort James
Fort James was a 17th-century British colonial fortification in what is now Lower Manhattan, New York City, that served as a key military and administrative center after the English seized New Amsterdam from the Dutch.
- 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: Old Fort Prison complex Target entity description: The Old Fort Prison complex is a historic Johannesburg jail, notorious for incarcerating anti-apartheid activists including Nelson Mandela and Mahatma Gandhi, now incorporated into the Constitutional Court precinct as a memorial site.
-
A.
Lincoln Prison
Lincoln Prison is a correctional facility located in the city of Lincoln in Lincolnshire, England.
-
B.
Kingston Penitentiary (historic)
Kingston Penitentiary (historic) is a former maximum-security federal prison in Kingston, Ontario, renowned as one of Canada’s oldest and most notorious correctional institutions.
-
C.
Blackwell's Island
Blackwell's Island, now known as Roosevelt Island, is a narrow island in New York City's East River historically associated with hospitals, asylums, and prisons.
-
D.
Eastern State Penitentiary
Eastern State Penitentiary is a historic former prison in Philadelphia, Pennsylvania, renowned for its revolutionary radial design and as one of the most famous and expensive prisons of the 19th century.
-
E.
Fort James
Fort James was a 17th-century British colonial fortification in what is now Lower Manhattan, New York City, that served as a key military and administrative center after the English seized New Amsterdam from the Dutch.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
heritage site
ⓘ
historic prison complex ⓘ memorial site ⓘ |
| adjacentTo | Constitutional Court of South Africa ⓘ |
| associatedWith |
South African human rights history
ⓘ
apartheid era ⓘ struggle against apartheid ⓘ |
| category |
Apartheid museums and memorials
ⓘ
Historic sites in South Africa ⓘ Prisons in Johannesburg ⓘ |
| city |
Johannesburg, South Africa
ⓘ
surface form:
Johannesburg
|
| country | South Africa ⓘ |
| currentFunction |
educational site
ⓘ
memorial to prisoners held there ⓘ public heritage attraction ⓘ |
| governingBody |
Constitution Hill Development Company
ⓘ
surface form:
Constitution Hill Trust
|
| hasFormerInmate |
Mahatma Gandhi
ⓘ
Nelson Mandela ⓘ anti-apartheid activists ⓘ |
| hasTheme |
human rights
ⓘ
justice ⓘ memory of political repression ⓘ |
| hasUse |
memorial
ⓘ
museum ⓘ prison ⓘ |
| hasVisitorAccess | guided tours ⓘ |
| heritageDesignation | historic site ⓘ |
| integratedInto | Constitutional Court precinct redevelopment ⓘ |
| locatedIn |
Gauteng
ⓘ
Johannesburg, South Africa ⓘ
surface form:
Johannesburg
South Africa ⓘ |
| notableFor |
association with Mahatma Gandhi
ⓘ
association with Nelson Mandela ⓘ incarceration of anti-apartheid activists ⓘ role in South African political history ⓘ |
| openToPublic | yes ⓘ |
| operatedAs | jail ⓘ |
| operatedBy | authorities of Johannesburg ⓘ |
| partOf |
Constitution Hill
ⓘ
Constitutional Court precinct ⓘ |
| preservationStatus | preserved as part of Constitution Hill ⓘ |
| significance |
site of incarceration of prominent leaders
ⓘ
symbol of past political oppression in South Africa ⓘ |
| usedFor |
detention of common-law prisoners
ⓘ
detention of political prisoners ⓘ |
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: Old Fort Prison complex Description of subject: The Old Fort Prison complex is a historic Johannesburg jail, notorious for incarcerating anti-apartheid activists including Nelson Mandela and Mahatma Gandhi, now incorporated into the Constitutional Court precinct as a memorial site.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Old Fort Prison