Triple

T5438367
Position Surface form Disambiguated ID Type / Status
Subject SFM E122067 entity
Predicate isAbbreviationFor P43 FINISHED
Object San Francisco (Caltrain)
San Francisco (Caltrain) is the northern terminus and major commuter rail station of the Caltrain line serving the San Francisco Bay Area.
 E522427 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 Francisco (Caltrain) | Statement: [SFM, isAbbreviationFor, San Francisco (Caltrain)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: San Francisco (Caltrain)
Context triple: [SFM, isAbbreviationFor, San Francisco (Caltrain)]
  • A. Caltrain
    Caltrain is a commuter rail service on the San Francisco Peninsula and in the Santa Clara Valley, connecting San Francisco to San Jose and Gilroy in California.
  • B. San Carlos Caltrain station
    San Carlos Caltrain station is a commuter rail station on the Caltrain line serving the city of San Carlos in San Mateo County, California.
  • C. San Bruno Caltrain station
    San Bruno Caltrain station is a commuter rail stop on Caltrain’s Peninsula corridor serving passengers in the city of San Bruno, south of San Francisco.
  • D. Redwood City Station
    Redwood City Station is a major Caltrain commuter rail stop in Redwood City, California, serving as a key transit hub along the San Francisco Peninsula.
  • E. Belmont Caltrain station
    Belmont Caltrain station is a commuter rail station in Belmont, California, providing Peninsula rail service on the Caltrain line between San Francisco and San Jose.
  • 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 Francisco (Caltrain)
Triple: [SFM, isAbbreviationFor, San Francisco (Caltrain)]
Generated description
San Francisco (Caltrain) is the northern terminus and major commuter rail station of the Caltrain line serving the San Francisco Bay Area.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: San Francisco (Caltrain)
Target entity description: San Francisco (Caltrain) is the northern terminus and major commuter rail station of the Caltrain line serving the San Francisco Bay Area.
  • A. Caltrain
    Caltrain is a commuter rail service on the San Francisco Peninsula and in the Santa Clara Valley, connecting San Francisco to San Jose and Gilroy in California.
  • B. San Carlos Caltrain station
    San Carlos Caltrain station is a commuter rail station on the Caltrain line serving the city of San Carlos in San Mateo County, California.
  • C. San Bruno Caltrain station
    San Bruno Caltrain station is a commuter rail stop on Caltrain’s Peninsula corridor serving passengers in the city of San Bruno, south of San Francisco.
  • D. Redwood City Station
    Redwood City Station is a major Caltrain commuter rail stop in Redwood City, California, serving as a key transit hub along the San Francisco Peninsula.
  • E. Belmont Caltrain station
    Belmont Caltrain station is a commuter rail station in Belmont, California, providing Peninsula rail service on the Caltrain line between San Francisco and San Jose.
  • 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_69bd46400768819092925d461c0b8432 completed March 20, 2026, 1:06 p.m.
NER Named-entity recognition batch_69bd91bce47c8190b9fd23444e636cdd completed March 20, 2026, 6:28 p.m.
NED1 Entity disambiguation (via context triple) batch_69bf487fdfe08190af6294021d1b81e5 completed March 22, 2026, 1:40 a.m.
NEDg Description generation batch_69bf497a88b48190b87bf175fe224211 completed March 22, 2026, 1:44 a.m.
NED2 Entity disambiguation (via description) batch_69bf4a1f6e1c8190a9ae94e45fb16cf9 completed March 22, 2026, 1:47 a.m.
Created at: March 20, 2026, 2:07 p.m.