Triple

T70732
Position Surface form Disambiguated ID Type / Status
Subject 1989 Loma Prieta earthquake E1415 entity
Predicate notableInfrastructureFailure P3823 FINISHED
Object Cypress Street Viaduct collapse
The Cypress Street Viaduct collapse was a catastrophic double-deck freeway failure in Oakland, California, during the 1989 Loma Prieta earthquake that became one of the disaster’s deadliest and most iconic structural failures.
E1415 NE FINISHED

How this triple was built (5 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: Cypress Street Viaduct collapse | Statement: [1989 Loma Prieta earthquake, notableInfrastructureFailure, Cypress Street Viaduct collapse]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Cypress Street Viaduct collapse
Context triple: [1989 Loma Prieta earthquake, notableInfrastructureFailure, Cypress Street Viaduct collapse]
  • A. 1989 Loma Prieta earthquake
    The 1989 Loma Prieta earthquake was a powerful magnitude 6.9 quake in Northern California that caused widespread damage in the San Francisco Bay Area, including freeway collapses and the disruption of the World Series.
  • B. 1906 San Francisco earthquake
    The 1906 San Francisco earthquake was a devastating magnitude 7.8 seismic event that struck Northern California, causing widespread destruction and fires that nearly leveled San Francisco and became one of the worst natural disasters in U.S. history.
  • C. Key Bridge
    Key Bridge is a historic steel-arch bridge spanning the Potomac River, connecting Washington, D.C. to Arlington, Virginia.
  • D. 14th Street Bridge complex
    The 14th Street Bridge complex is a group of highway and railway bridges over the Potomac River that serves as a major transportation link between Northern Virginia and Washington, D.C.
  • E. Memorial Bridge
    Memorial Bridge is a prominent ceremonial bridge spanning the Potomac River, symbolically linking Arlington National Cemetery with the Lincoln Memorial in Washington, D.C.
  • 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: Cypress Street Viaduct collapse
Triple: [1989 Loma Prieta earthquake, notableInfrastructureFailure, Cypress Street Viaduct collapse]
Generated description
The Cypress Street Viaduct collapse was a catastrophic double-deck freeway failure in Oakland, California, during the 1989 Loma Prieta earthquake that became one of the disaster’s deadliest and most iconic structural failures.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Cypress Street Viaduct collapse
Target entity description: The Cypress Street Viaduct collapse was a catastrophic double-deck freeway failure in Oakland, California, during the 1989 Loma Prieta earthquake that became one of the disaster’s deadliest and most iconic structural failures.
  • A. 1989 Loma Prieta earthquake chosen
    The 1989 Loma Prieta earthquake was a powerful magnitude 6.9 quake in Northern California that caused widespread damage in the San Francisco Bay Area, including freeway collapses and the disruption of the World Series.
  • B. 1906 San Francisco earthquake
    The 1906 San Francisco earthquake was a devastating magnitude 7.8 seismic event that struck Northern California, causing widespread destruction and fires that nearly leveled San Francisco and became one of the worst natural disasters in U.S. history.
  • C. Key Bridge
    Key Bridge is a historic steel-arch bridge spanning the Potomac River, connecting Washington, D.C. to Arlington, Virginia.
  • D. Hell Gate
    Hell Gate is a narrow, turbulent tidal strait in New York City that connects the East River to the Long Island Sound and is known for its historically treacherous currents.
  • E. 14th Street Bridge complex
    The 14th Street Bridge complex is a group of highway and railway bridges over the Potomac River that serves as a major transportation link between Northern Virginia and Washington, D.C.
  • F. None of above.
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: notableInfrastructureFailure
Context triple: [1989 Loma Prieta earthquake, notableInfrastructureFailure, Cypress Street Viaduct collapse]
  • A. fault
    Indicates that one entity is responsible or at blame for a problem, error, or undesirable outcome involving another entity or situation.
  • B. notableSystem
    Indicates that a system is recognized as significant, prominent, or noteworthy in a particular context or domain.
  • C. lostPowerIn
    Indicates that an entity has experienced a loss of electrical or functional power while in or at a specified location or context.
  • D. notableSite
    Indicates that a site holds particular significance, prominence, or recognition in some context.
  • E. significantEvent
    Indicates that an event involving the entities is of notable importance or impact within a given context.
  • F. None of above. chosen

Provenance (7 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_69a24c06b3bc8190aa4ac89026115efc completed Feb. 28, 2026, 1:59 a.m.
NER Named-entity recognition batch_69a24fd16c248190a6ee4cd96c388772 completed Feb. 28, 2026, 2:15 a.m.
NED1 Entity disambiguation (via context triple) batch_69a2554ffb8c8190a30aceecd7f30d96 completed Feb. 28, 2026, 2:39 a.m.
NEDg Description generation batch_69a25943cba88190a78f708d453ce968 completed Feb. 28, 2026, 2:56 a.m.
NED2 Entity disambiguation (via description) batch_69a259c2706c8190b5319c004e207c29 completed Feb. 28, 2026, 2:58 a.m.
PD Predicate disambiguation batch_69a24eaa0df88190add55579b2b9fd02 completed Feb. 28, 2026, 2:10 a.m.
PDg Predicate description generation batch_69a24fcf5a88819088c5fa4c08476358 completed Feb. 28, 2026, 2:15 a.m.
Created at: Feb. 28, 2026, 2:03 a.m.