Black Hole of Calcutta
E165007
The Black Hole of Calcutta was a small prison cell in Fort William where a large number of British prisoners were allegedly confined overnight in 1756, resulting in many deaths and becoming a notorious symbol of colonial-era atrocity.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T1435928 — 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: Black Hole of Calcutta Context triple: [Siege of Calcutta, associatedWith, Black Hole of Calcutta]
-
A.
The Butcher of Amritsar
The Butcher of Amritsar is the notorious epithet given to British officer Reginald Dyer for ordering the 1919 Jallianwala Bagh massacre in Amritsar, India.
-
B.
Ghare-Baire
Ghare-Baire is a 1916 Bengali novel by Rabindranath Tagore that explores nationalism, gender, and personal freedom against the backdrop of the Swadeshi movement in colonial India.
-
C.
Shantaram
Shantaram is a novel by Gregory David Roberts that follows an Australian fugitive who builds a new life in the underworld of Bombay, blending adventure, crime, and spiritual exploration.
-
D.
Calcutta Time
Calcutta Time was a former local time standard used in Kolkata (then Calcutta) before the adoption of a unified national time zone in India.
-
E.
The Cairo Gang
The Cairo Gang is an indie rock project led by American musician Emmett Kelly, known for its atmospheric, folk-influenced sound and collaborations with artists like Bonnie "Prince" Billy.
- 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: Black Hole of Calcutta Target entity description: The Black Hole of Calcutta was a small prison cell in Fort William where a large number of British prisoners were allegedly confined overnight in 1756, resulting in many deaths and becoming a notorious symbol of colonial-era atrocity.
-
A.
The Butcher of Amritsar
The Butcher of Amritsar is the notorious epithet given to British officer Reginald Dyer for ordering the 1919 Jallianwala Bagh massacre in Amritsar, India.
-
B.
Ghare-Baire
Ghare-Baire is a 1916 Bengali novel by Rabindranath Tagore that explores nationalism, gender, and personal freedom against the backdrop of the Swadeshi movement in colonial India.
-
C.
Shantaram
Shantaram is a novel by Gregory David Roberts that follows an Australian fugitive who builds a new life in the underworld of Bombay, blending adventure, crime, and spiritual exploration.
-
D.
Calcutta Time
Calcutta Time was a former local time standard used in Kolkata (then Calcutta) before the adoption of a unified national time zone in India.
-
E.
The Cairo Gang
The Cairo Gang is an indie rock project led by American musician Emmett Kelly, known for its atmospheric, folk-influenced sound and collaborations with artists like Bonnie "Prince" Billy.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
colonial-era atrocity
ⓘ
historical event ⓘ mass fatality incident ⓘ |
| aftermath |
Battle of Plassey (1757)
ⓘ
linked to:
Battle of Plassey
recapture of Calcutta by British forces ⓘ |
| allegedDurationOfConfinement | one night ⓘ |
| associatedWith |
East India Company
ⓘ
linked to:
British East India Company
Fort William ⓘ Siraj ud-Daulah ⓘ |
| cause | capture of Fort William by Siraj ud-Daulah ⓘ |
| cellDimensions | about 14 feet by 18 feet ⓘ |
| cellType | prison cell ⓘ |
| commemoratedBy |
Black Hole Monument in Calcutta
ⓘ
linked to:
B.B.D. Bagh, Kolkata
|
| controversial | true ⓘ |
| country | India ⓘ |
| date | 20 June 1756 ⓘ |
| disputedAspect |
accuracy of Holwell's account
ⓘ
exact number of deaths ⓘ exact number of prisoners confined ⓘ |
| fieldOfStudy |
British Empire studies
ⓘ
South Asian history ⓘ colonial history ⓘ |
| hasInterpretation |
example of exaggeration in colonial narratives
ⓘ
genuine but embellished tragedy ⓘ |
| languageOfPrimaryAccount | English ⓘ |
| locatedIn |
Bengal
ⓘ
Calcutta ⓘ Fort William, Calcutta ⓘ
linked to:
Fort William, Kolkata
India ⓘ |
| monumentStatus | original monument removed in the 20th century ⓘ |
| numberOfSurvivorsClaimed | 23 ⓘ |
| numberOfVictimsClaimed | 146 ⓘ |
| partOf |
Anglo-French conflicts in India
ⓘ
linked to:
Anglo-French rivalry in India
Seven Years' War ⓘ |
| perpetrator | forces of Siraj ud-Daulah ⓘ |
| primarySource | John Zephaniah Holwell ⓘ |
| reportedBy | John Zephaniah Holwell ⓘ |
| result |
death of many prisoners
ⓘ
strengthening of anti-Indian sentiment in Britain ⓘ use as justification for British retribution in Bengal ⓘ widespread outrage in Britain ⓘ |
| symbolOf |
British victimhood narrative in India
ⓘ
Indian cruelty in British imperial propaganda ⓘ colonial-era atrocity ⓘ |
| timePeriod | 18th century ⓘ |
| usedIn | British imperial propaganda ⓘ |
| victim |
Anglo-Indian civilians
ⓘ
British prisoners of war ⓘ |
| year | 1756 ⓘ |
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: Black Hole of Calcutta Description of subject: The Black Hole of Calcutta was a small prison cell in Fort William where a large number of British prisoners were allegedly confined overnight in 1756, resulting in many deaths and becoming a notorious symbol of colonial-era atrocity.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
John Zephaniah Holwell
→
notableWork
→
A Genuine Narrative of the Deplorable Deaths of the English Gentlemen and Others Who Were Suffocated in the Black Hole
ⓘ
linked to: Black Hole of Calcutta