Triple

T11023928
Position Surface form Disambiguated ID Type / Status
Subject San Ysidro, California E260565 entity
Predicate hasHistoricalEvent P2107 FINISHED
Object San Ysidro McDonald’s massacre
The San Ysidro McDonald’s massacre was a 1984 mass shooting at a McDonald’s restaurant in San Ysidro, California, in which a gunman killed 21 people and wounded many others, making it one of the deadliest mass shootings in U.S. history at the time.
E900440 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: San Ysidro McDonald’s massacre | Statement: [San Ysidro, California, hasHistoricalEvent, San Ysidro McDonald’s massacre]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: San Ysidro McDonald’s massacre
Context triple: [San Ysidro, California, hasHistoricalEvent, San Ysidro McDonald’s massacre]
  • A. Santa Cruz massacre
    The Santa Cruz massacre was a 1991 incident in Dili, East Timor, in which Indonesian security forces opened fire on peaceful pro-independence demonstrators, killing and wounding hundreds and drawing global attention to East Timor’s struggle.
  • B. Corpus Christi massacre
    The Corpus Christi massacre was a 1971 government-led attack on student demonstrators in Mexico City, in which paramilitary forces violently repressed protesters, resulting in numerous deaths and injuries.
  • C. Columbine High School massacre
    The Columbine High School massacre was a 1999 school shooting in Littleton, Colorado, in which two students murdered 13 people and wounded many others before killing themselves, becoming a defining event in debates over gun violence and school safety in the United States.
  • D. Black Friday massacre
    The Black Friday massacre refers to the deadly crackdown by Iranian security forces on protestors in Tehran on 8 September 1978, a pivotal and brutal event during the Iranian Revolution.
  • E. massacre at Cholula
    The massacre at Cholula was a brutal 1519 slaughter of thousands of Indigenous inhabitants by Hernán Cortés and his forces during the Spanish conquest of the Aztec Empire.
  • 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: San Ysidro McDonald’s massacre
Triple: [San Ysidro, California, hasHistoricalEvent, San Ysidro McDonald’s massacre]
Generated description
The San Ysidro McDonald’s massacre was a 1984 mass shooting at a McDonald’s restaurant in San Ysidro, California, in which a gunman killed 21 people and wounded many others, making it one of the deadliest mass shootings in U.S. history at the time.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: San Ysidro McDonald’s massacre
Target entity description: The San Ysidro McDonald’s massacre was a 1984 mass shooting at a McDonald’s restaurant in San Ysidro, California, in which a gunman killed 21 people and wounded many others, making it one of the deadliest mass shootings in U.S. history at the time.
  • A. Santa Cruz massacre
    The Santa Cruz massacre was a 1991 incident in Dili, East Timor, in which Indonesian security forces opened fire on peaceful pro-independence demonstrators, killing and wounding hundreds and drawing global attention to East Timor’s struggle.
  • B. Corpus Christi massacre
    The Corpus Christi massacre was a 1971 government-led attack on student demonstrators in Mexico City, in which paramilitary forces violently repressed protesters, resulting in numerous deaths and injuries.
  • C. Columbine High School massacre
    The Columbine High School massacre was a 1999 school shooting in Littleton, Colorado, in which two students murdered 13 people and wounded many others before killing themselves, becoming a defining event in debates over gun violence and school safety in the United States.
  • D. Black Friday massacre
    The Black Friday massacre refers to the deadly crackdown by Iranian security forces on protestors in Tehran on 8 September 1978, a pivotal and brutal event during the Iranian Revolution.
  • E. massacre at Cholula
    The massacre at Cholula was a brutal 1519 slaughter of thousands of Indigenous inhabitants by Hernán Cortés and his forces during the Spanish conquest of the Aztec Empire.
  • 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_69d6aa9687448190b28d353b1b6a610e completed April 8, 2026, 7:20 p.m.
NER Named-entity recognition batch_69d797be9f148190a3a967bad5947496 completed April 9, 2026, 12:12 p.m.
NED1 Entity disambiguation (via context triple) batch_69e3750917d481909e73de0bfae27827 completed April 18, 2026, 12:11 p.m.
NEDg Description generation batch_69e37ab860f48190808ba0076cfa9c98 completed April 18, 2026, 12:36 p.m.
NED2 Entity disambiguation (via description) batch_69e3864dd0d48190b3fd81381f5d7418 completed April 18, 2026, 1:25 p.m.
Created at: April 8, 2026, 9:25 p.m.