Triple

T4267424
Position Surface form Disambiguated ID Type / Status
Subject Hayward Fault E96858 entity
Predicate lastMajorEarthquakeName P55087 FINISHED
Object 1868 Hayward earthquake
The 1868 Hayward earthquake was a powerful and destructive seismic event that struck the San Francisco Bay Area in California, causing extensive damage and loss of life and serving as a key historical benchmark for seismic risk on the Hayward Fault.
E425610 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: 1868 Hayward earthquake | Statement: [Hayward Fault, lastMajorEarthquakeName, 1868 Hayward earthquake]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: 1868 Hayward earthquake
Context triple: [Hayward Fault, lastMajorEarthquakeName, 1868 Hayward earthquake]
  • A. 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.
  • B. Loma Prieta
    Loma Prieta is a prominent peak in California’s Santa Cruz Mountains, best known for lending its name to the devastating 1989 Loma Prieta earthquake.
  • C. 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.
  • D. 1968 Borrego Mountain earthquake
    The 1968 Borrego Mountain earthquake was a powerful magnitude 6.5–6.8 temblor in Southern California that caused significant surface rupture and damage, and became an important case study in modern seismology and fault mechanics.
  • E. 1185 Lincoln earthquake
    The 1185 Lincoln earthquake was a significant medieval seismic event in England that caused extensive damage in the city of Lincoln and led to major reconstruction of Lincoln Cathedral.
  • 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: 1868 Hayward earthquake
Triple: [Hayward Fault, lastMajorEarthquakeName, 1868 Hayward earthquake]
Generated description
The 1868 Hayward earthquake was a powerful and destructive seismic event that struck the San Francisco Bay Area in California, causing extensive damage and loss of life and serving as a key historical benchmark for seismic risk on the Hayward Fault.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: 1868 Hayward earthquake
Target entity description: The 1868 Hayward earthquake was a powerful and destructive seismic event that struck the San Francisco Bay Area in California, causing extensive damage and loss of life and serving as a key historical benchmark for seismic risk on the Hayward Fault.
  • A. 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.
  • B. Loma Prieta
    Loma Prieta is a prominent peak in California’s Santa Cruz Mountains, best known for lending its name to the devastating 1989 Loma Prieta earthquake.
  • C. 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.
  • D. 1968 Borrego Mountain earthquake
    The 1968 Borrego Mountain earthquake was a powerful magnitude 6.5–6.8 temblor in Southern California that caused significant surface rupture and damage, and became an important case study in modern seismology and fault mechanics.
  • E. 1185 Lincoln earthquake
    The 1185 Lincoln earthquake was a significant medieval seismic event in England that caused extensive damage in the city of Lincoln and led to major reconstruction of Lincoln Cathedral.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: lastMajorEarthquakeName
Context triple: [Hayward Fault, lastMajorEarthquakeName, 1868 Hayward earthquake]
  • A. lastKnownGreatEarthquakeGenerated
    Indicates that the referenced event is the most recent known great earthquake that produced or generated the associated effect or data.
  • B. notableEarthquake
    Indicates that an earthquake event is significant or noteworthy due to its magnitude, impact, or historical importance.
  • C. earthquakeMagnitude
    Indicates the measured strength or intensity of an earthquake, typically expressed on a standardized magnitude scale.
  • D. earthquakeDate
    Indicates the specific calendar date on which an earthquake event occurred.
  • E. facedMajorEarthquake
    Indicates that an entity has experienced or been subjected to a significant or severe earthquake event.
  • 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_69b34543f06c8190915ebb1a4574ffa9 completed March 12, 2026, 10:59 p.m.
NER Named-entity recognition batch_69b34fce710481909d90ed4a3d150fde completed March 12, 2026, 11:44 p.m.
NED1 Entity disambiguation (via context triple) batch_69b5b79992a08190b614a89aa36cf674 completed March 14, 2026, 7:31 p.m.
NEDg Description generation batch_69b5b820ba7481909fbe7685a353ef51 completed March 14, 2026, 7:33 p.m.
NED2 Entity disambiguation (via description) batch_69b5b881c80081909af084ff4b43b01e completed March 14, 2026, 7:35 p.m.
PD Predicate disambiguation batch_69b347f8dcb08190a725c1f7fb5a7466 completed March 12, 2026, 11:10 p.m.
PDg Predicate description generation batch_69b34e0606488190baadf469a1afc3c2 completed March 12, 2026, 11:36 p.m.
Created at: March 12, 2026, 11:07 p.m.