Triple

T22161672
Position Surface form Disambiguated ID Type / Status
Subject Sacramento Northern Railway E547684 entity
Predicate notableRoute P22 FINISHED
Object Oakland–Sacramento main line 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: Oakland–Sacramento main line | Statement: [Sacramento Northern Railway, notableRoute, Oakland–Sacramento main line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Oakland–Sacramento main line
Context triple: [Sacramento Northern Railway, notableRoute, Oakland–Sacramento main line]
  • A. East Bay–Central Valley rail corridor
    The East Bay–Central Valley rail corridor is a major freight and passenger rail route linking California’s San Francisco Bay Area with the Central Valley through the East Bay.
  • B. San Francisco–San Jose rail corridor
    The San Francisco–San Jose rail corridor is a major commuter and intercity rail line on the San Francisco Peninsula that connects San Francisco and San Jose, primarily served by Caltrain.
  • C. San Joaquins route
    The San Joaquins route is an Amtrak passenger rail service in California that connects the San Francisco Bay Area and Sacramento with the Central Valley and Bakersfield.
  • D. Union Pacific Railroad Oakland Subdivision chosen
    The Union Pacific Railroad Oakland Subdivision is a key freight and passenger rail corridor in Northern California that connects the East Bay with the Central Valley and is used by services such as the Altamont Corridor Express.
  • E. Alameda/Oakland–San Francisco route
    The Alameda/Oakland–San Francisco route is a commuter and tourist ferry service across San Francisco Bay connecting the East Bay cities of Alameda and Oakland with San Francisco.
  • 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_69e11e3c4c5c81908d336165816b12e0 completed April 16, 2026, 5:37 p.m.
NER Named-entity recognition batch_69f12a2d8064819094d27ef9f15c6a1f completed April 28, 2026, 9:44 p.m.
Created at: April 16, 2026, 8:34 p.m.