Triple

T2795920
Position Surface form Disambiguated ID Type / Status
Subject Walnut Creek, California E53035 entity
Predicate BARTStation P28508 FINISHED
Object Walnut Creek station
Walnut Creek station is a Bay Area Rapid Transit (BART) station in Walnut Creek, California, serving as a key transit hub for commuters in the East Bay region.
E301379 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: Walnut Creek station | Statement: [Walnut Creek, California, BARTStation, Walnut Creek station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Walnut Creek station
Context triple: [Walnut Creek, California, BARTStation, Walnut Creek station]
  • A. San Mateo station
    San Mateo station is a Caltrain commuter rail stop in San Mateo, California, serving as a key transit point for Peninsula rail passengers between San Francisco and San Jose.
  • B. Millbrae station
    Millbrae station is a major intermodal transit hub in Millbrae, California, serving as a connection point between Caltrain commuter rail, BART rapid transit, and other local transportation services.
  • C. 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.
  • D. Emeryville station
    Emeryville station is a major Amtrak rail terminal in Emeryville, California, serving as the primary San Francisco–area hub and western terminus for long-distance routes like the California Zephyr.
  • E. Sunnyvale Station
    Sunnyvale Station is a commuter rail station in Sunnyvale, California, serving Caltrain passengers along the San Francisco Peninsula.
  • 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: Walnut Creek station
Triple: [Walnut Creek, California, BARTStation, Walnut Creek station]
Generated description
Walnut Creek station is a Bay Area Rapid Transit (BART) station in Walnut Creek, California, serving as a key transit hub for commuters in the East Bay region.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Walnut Creek station
Target entity description: Walnut Creek station is a Bay Area Rapid Transit (BART) station in Walnut Creek, California, serving as a key transit hub for commuters in the East Bay region.
  • A. San Mateo station
    San Mateo station is a Caltrain commuter rail stop in San Mateo, California, serving as a key transit point for Peninsula rail passengers between San Francisco and San Jose.
  • B. Millbrae station
    Millbrae station is a major intermodal transit hub in Millbrae, California, serving as a connection point between Caltrain commuter rail, BART rapid transit, and other local transportation services.
  • C. 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.
  • D. Emeryville station
    Emeryville station is a major Amtrak rail terminal in Emeryville, California, serving as the primary San Francisco–area hub and western terminus for long-distance routes like the California Zephyr.
  • E. Sunnyvale Station
    Sunnyvale Station is a commuter rail station in Sunnyvale, California, serving Caltrain passengers along the San Francisco Peninsula.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: BARTStation
Context triple: [Walnut Creek, California, BARTStation, Walnut Creek station]
  • A. terminusStation
    Indicates that a station serves as the final endpoint or terminal stop for a given route or service.
  • B. subwayStation chosen
    Indicates that one entity is a subway station associated with, located in, or serving the other entity.
  • C. stationName
    Indicates the name assigned to a particular station in the relationship.
  • D. interchangeStation
    Indicates a station where passengers can transfer between different routes, lines, or modes of transportation.
  • E. railroadTerminusFor
    Indicates that one location serves as the end point or final station of a particular railroad line for another location.
  • 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_69ab495a90788190941b6917e1eca3a6 completed March 6, 2026, 9:38 p.m.
NER Named-entity recognition batch_69abddef754081908e6218dc2208e0fd completed March 7, 2026, 8:12 a.m.
NED1 Entity disambiguation (via context triple) batch_69afce9069f481908c4a3e8814caf590 completed March 10, 2026, 7:56 a.m.
NEDg Description generation batch_69afcf3aa64081909fe4007d94df48c2 completed March 10, 2026, 7:58 a.m.
NED2 Entity disambiguation (via description) batch_69afcfe8a140819095daa37d539e4c72 completed March 10, 2026, 8:01 a.m.
PD Predicate disambiguation batch_69abdd040f9481908e9c7a2df88ea1ae completed March 7, 2026, 8:08 a.m.
Created at: March 6, 2026, 9:58 p.m.