Triple

T5661496
Position Surface form Disambiguated ID Type / Status
Subject Downtown Palo Alto E124750 entity
Predicate hasPublicTransitHub P2413 FINISHED
Object Palo Alto Caltrain Station
Palo Alto Caltrain Station is a major commuter rail station in Palo Alto, California, serving as a key transit hub for Caltrain services along the San Francisco Peninsula.
E537939 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: Palo Alto Caltrain Station | Statement: [Downtown Palo Alto, hasPublicTransitHub, Palo Alto Caltrain Station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Palo Alto Caltrain Station
Context triple: [Downtown Palo Alto, hasPublicTransitHub, Palo Alto 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 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. 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 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.
  • 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: Palo Alto Caltrain Station
Triple: [Downtown Palo Alto, hasPublicTransitHub, Palo Alto Caltrain Station]
Generated description
Palo Alto Caltrain Station is a major commuter rail station in Palo Alto, California, serving as a key transit hub for Caltrain services along the San Francisco Peninsula.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Palo Alto Caltrain Station
Target entity description: Palo Alto Caltrain Station is a major commuter rail station in Palo Alto, California, serving as a key transit hub for Caltrain services along the San Francisco Peninsula.
  • 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 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. 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 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.
  • 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
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: hasPublicTransitHub
Context triple: [Downtown Palo Alto, hasPublicTransitHub, Palo Alto Caltrain Station]
  • A. hasPublicTransitProvider
    Indicates that a place or region is served by a specific public transit operating organization or agency.
  • B. hasPublicTransitFunction
    Indicates that something serves a role or provides a service related to public transportation operations or infrastructure.
  • C. hasTransportHub chosen
    Indicates that a location contains or serves as a central facility where multiple transport routes or modes connect for passenger or cargo movement.
  • D. hasPublicTransitMode
    Indicates that a location, route, or service is associated with or supports a specific mode of public transportation (e.g., bus, train, tram).
  • E. hasPublicTransitRoute
    Indicates that there exists a public transportation route (such as a bus, train, or tram line) connecting or serving the related entities.
  • F. None of above.

Provenance (6 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_69c0082774a481909d7e63fb2aad56ac completed March 22, 2026, 3:17 p.m.
NER Named-entity recognition batch_69c0236d3f94819095111c41a323612d completed March 22, 2026, 5:14 p.m.
NED1 Entity disambiguation (via context triple) batch_69c04da6fa808190a3c500ee664bb150 completed March 22, 2026, 8:14 p.m.
NEDg Description generation batch_69c04edf30448190a60eda49b8b031a0 completed March 22, 2026, 8:19 p.m.
NED2 Entity disambiguation (via description) batch_69c04fb62690819083327781cb857ccc completed March 22, 2026, 8:23 p.m.
PD Predicate disambiguation batch_69c021ba4ec481909db8cdbf0e907dd6 completed March 22, 2026, 5:07 p.m.
Created at: March 22, 2026, 3:42 p.m.