Triple

T406317
Position Surface form Disambiguated ID Type / Status
Subject Nelson Mandela E9390 entity
Predicate placeOfDetention P6464 FINISHED
Object Victor Verster Prison
Victor Verster Prison is a South African correctional facility best known as the place where Nelson Mandela spent the final years of his imprisonment before his release in 1990.
 E52261 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Victor Verster Prison | Statement: [Nelson Mandela, placeOfDetention, Victor Verster Prison]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Victor Verster Prison
Context triple: [Nelson Mandela, placeOfDetention, Victor Verster Prison]
  • A. Pollsmoor Prison
    Pollsmoor Prison is a high-security South African correctional facility in Cape Town, historically notable for holding prominent anti-apartheid activists including Nelson Mandela.
  • B. Werl Prison
    Werl Prison is a correctional facility in Werl, Germany, historically used by the Allies after World War II to incarcerate high-ranking Nazi war criminals.
  • C. Robben Island
    Robben Island is a historic island off the coast of Cape Town best known for housing the prison where Nelson Mandela and other anti-apartheid activists were incarcerated.
  • D. Landsberg Prison
    Landsberg Prison is a Bavarian detention facility best known as the place where Adolf Hitler was incarcerated in 1924 and wrote much of "Mein Kampf."
  • E. Inverness Jail
    Inverness Jail is a county correctional facility in Multnomah County, Oregon, used primarily for housing pretrial detainees and sentenced inmates.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Victor Verster Prison
Triple: [Nelson Mandela, placeOfDetention, Victor Verster Prison]
Generated description
Victor Verster Prison is a South African correctional facility best known as the place where Nelson Mandela spent the final years of his imprisonment before his release in 1990.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Victor Verster Prison
Target entity description: Victor Verster Prison is a South African correctional facility best known as the place where Nelson Mandela spent the final years of his imprisonment before his release in 1990.
  • A. Pollsmoor Prison
    Pollsmoor Prison is a high-security South African correctional facility in Cape Town, historically notable for holding prominent anti-apartheid activists including Nelson Mandela.
  • B. Werl Prison
    Werl Prison is a correctional facility in Werl, Germany, historically used by the Allies after World War II to incarcerate high-ranking Nazi war criminals.
  • C. Robben Island
    Robben Island is a historic island off the coast of Cape Town best known for housing the prison where Nelson Mandela and other anti-apartheid activists were incarcerated.
  • D. Landsberg Prison
    Landsberg Prison is a Bavarian detention facility best known as the place where Adolf Hitler was incarcerated in 1924 and wrote much of "Mein Kampf."
  • E. Inverness Jail
    Inverness Jail is a county correctional facility in Multnomah County, Oregon, used primarily for housing pretrial detainees and sentenced inmates.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69a2e8004cb88190b92ed1add6abf41a completed Feb. 28, 2026, 1:05 p.m.
NER Named-entity recognition batch_69a2ecbc00508190bbb602179273f29c completed Feb. 28, 2026, 1:25 p.m.
NED1 Entity disambiguation (via context triple) batch_69a41b47e87c8190bb9e62dcee7a59c6 completed March 1, 2026, 10:56 a.m.
NEDg Description generation batch_69a41bff0e808190bc83036a3abd6679 completed March 1, 2026, 10:59 a.m.
NED2 Entity disambiguation (via description) batch_69a41c51dbb48190a66f7e830089322e completed March 1, 2026, 11 a.m.
Created at: Feb. 28, 2026, 1:08 p.m.