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.