Triple

T20530662
Position Surface form Disambiguated ID Type / Status
Subject Los Angeles–Seattle rail corridor E504057 entity
Predicate usesRailLine P848 FINISHED
Object Union Pacific Los Angeles Subdivision — NE NERFINISHED

How this triple was built (3 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: Union Pacific Los Angeles Subdivision | Statement: [Los Angeles–Seattle rail corridor, usesRailLine, Union Pacific Los Angeles Subdivision]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Union Pacific Los Angeles Subdivision
Context triple: [Los Angeles–Seattle rail corridor, usesRailLine, Union Pacific Los Angeles Subdivision]
  • A. Union Pacific Railroad Coast Subdivision
    The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
  • B. Union Pacific Valley Subdivision
    The Union Pacific Valley Subdivision is a railroad line operated by Union Pacific that serves as a key freight corridor within its regional rail network.
  • C. Union Pacific Geneva Subdivision
    The Union Pacific Geneva Subdivision is a major freight rail line in the Chicago area used by Union Pacific Railroad for both mainline operations and commuter rail services.
  • D. Union Pacific Railroad Fresno Subdivision
    The Union Pacific Railroad Fresno Subdivision is a key freight and passenger rail corridor in California’s Central Valley that carries both Union Pacific trains and Altamont Corridor Express commuter services.
  • E. Union Pacific Railroad Niles Subdivision
    The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Union Pacific Los Angeles Subdivision
Target entity description: The Union Pacific Los Angeles Subdivision is a major freight rail line in Southern California that forms a key segment of Union Pacific’s north–south mainline between Los Angeles and the Pacific Northwest.
  • A. Union Pacific Railroad Coast Subdivision
    The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
  • B. Union Pacific Valley Subdivision
    The Union Pacific Valley Subdivision is a railroad line operated by Union Pacific that serves as a key freight corridor within its regional rail network.
  • C. Union Pacific Geneva Subdivision
    The Union Pacific Geneva Subdivision is a major freight rail line in the Chicago area used by Union Pacific Railroad for both mainline operations and commuter rail services.
  • D. Union Pacific Railroad Fresno Subdivision
    The Union Pacific Railroad Fresno Subdivision is a key freight and passenger rail corridor in California’s Central Valley that carries both Union Pacific trains and Altamont Corridor Express commuter services.
  • E. Union Pacific Railroad Niles Subdivision
    The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
  • F. None of above. chosen

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_69e0b4b3a6e08190ae663701f50fab8e completed April 16, 2026, 10:06 a.m.
NER Named-entity recognition batch_69e6a06b923c81908ba24be6645a7c61 completed April 20, 2026, 9:53 p.m.
Created at: April 16, 2026, 11:37 a.m.