Triple

T23158710
Position Surface form Disambiguated ID Type / Status
Subject BART Yellow Line E578519 entity
Predicate hasStation P35 FINISHED
Object Pleasant Hill/Contra Costa Centre station — NE NERFINISHED

How this triple was built (2 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: Pleasant Hill/Contra Costa Centre station | Statement: [BART Yellow Line, hasStation, Pleasant Hill/Contra Costa Centre station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Pleasant Hill/Contra Costa Centre station
Context triple: [BART Yellow Line, hasStation, Pleasant Hill/Contra Costa Centre station]
  • A. Pleasant Hill/Contra Costa Centre station chosen
    Pleasant Hill/Contra Costa Centre station is a Bay Area Rapid Transit (BART) station in Contra Costa County, California, serving the Pleasant Hill and Contra Costa Centre communities along the Pittsburg/Bay Point–SFO/Millbrae line.
  • B. 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.
  • C. Castro Valley station
    Castro Valley station is a Bay Area Rapid Transit (BART) station in Castro Valley, California, serving as a regional commuter rail stop in the East Bay.
  • D. 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.
  • E. BART Pleasant Hill station
    BART Pleasant Hill station is a Bay Area Rapid Transit station in Pleasant Hill, California, serving as a major commuter hub for regional rail and local bus connections.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 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_69e245fc75348190a0288401044c8af8 completed April 17, 2026, 2:38 p.m.
NER Named-entity recognition batch_69f18efeddd48190b6d03d2146583dcc completed April 29, 2026, 4:54 a.m.
Created at: April 17, 2026, 4:02 p.m.