Triple

T4715462
Position Surface form Disambiguated ID Type / Status
Subject San Carlos, California E104625 entity
Predicate hasTransportationFacility P2413 FINISHED
Object 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.
 E464478 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 Carlos Caltrain station | Statement: [San Carlos, California, hasTransportationFacility, San Carlos Caltrain station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: San Carlos Caltrain station
Context triple: [San Carlos, California, hasTransportationFacility, San Carlos Caltrain station]
  • A. 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.
  • B. 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.
  • C. Broadway Caltrain station
    Broadway Caltrain station is a commuter rail stop in Burlingame, California, serving passengers on Caltrain’s Peninsula Corridor between San Francisco and San Jose.
  • D. San Jose Diridon station
    San Jose Diridon station is a major intermodal transit hub in San Jose, California, serving commuter rail, intercity rail, light rail, and bus services.
  • E. Burlingame Caltrain station
    Burlingame Caltrain station is a commuter rail station in Burlingame, California, served by Caltrain trains along the San Francisco Peninsula corridor.
  • 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 Carlos Caltrain station
Triple: [San Carlos, California, hasTransportationFacility, San Carlos Caltrain station]
Generated description
San Carlos Caltrain station is a commuter rail station on the Caltrain line serving the city of San Carlos in San Mateo County, California.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: San Carlos Caltrain station
Target entity description: San Carlos Caltrain station is a commuter rail station on the Caltrain line serving the city of San Carlos in San Mateo County, California.
  • A. 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.
  • B. 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.
  • C. Broadway Caltrain station
    Broadway Caltrain station is a commuter rail stop in Burlingame, California, serving passengers on Caltrain’s Peninsula Corridor between San Francisco and San Jose.
  • D. San Jose Diridon station
    San Jose Diridon station is a major intermodal transit hub in San Jose, California, serving commuter rail, intercity rail, light rail, and bus services.
  • E. Burlingame Caltrain station
    Burlingame Caltrain station is a commuter rail station in Burlingame, California, served by Caltrain trains along the San Francisco Peninsula corridor.
  • 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_69bd43ec4a348190bc41afae43375e71 completed March 20, 2026, 12:56 p.m.
NER Named-entity recognition batch_69bd6408dc5c8190a8d6b1c1a3eba2df completed March 20, 2026, 3:13 p.m.
NED1 Entity disambiguation (via context triple) batch_69be108440108190a7dc1bbfb27ae6f5 completed March 21, 2026, 3:29 a.m.
NEDg Description generation batch_69be14b0425c8190afb8a99ce88d8785 completed March 21, 2026, 3:46 a.m.
NED2 Entity disambiguation (via description) batch_69be1504228c81908963d42441931c96 completed March 21, 2026, 3:48 a.m.
Created at: March 20, 2026, 1:18 p.m.