Triple

T4181089
Position Surface form Disambiguated ID Type / Status
Subject Metrolink at Union Station E88195 entity
Predicate owner P347 FINISHED
Object Southern California Regional Rail Authority E203639 NE FINISHED

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: Southern California Regional Rail Authority | Statement: [Metrolink at Union Station, owner, Southern California Regional Rail Authority]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Southern California Regional Rail Authority
Context triple: [Metrolink at Union Station, owner, Southern California Regional Rail Authority]
  • A. Los Angeles County Metropolitan Transportation Authority
    The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
  • B. Metrolink (Southern California) chosen
    Metrolink (Southern California) is a regional commuter rail system serving Los Angeles and surrounding counties, providing longer-distance transit connections across the Greater Los Angeles area.
  • C. San Diego Metropolitan Transit System
    The San Diego Metropolitan Transit System is the public transportation agency that operates buses and light rail services throughout the San Diego, California metropolitan area.
  • D. Metrolink
    Metrolink is the light rail tram system serving Greater Manchester, England, connecting central Manchester with surrounding towns and key destinations across the metropolitan area.
  • E. Sacramento Regional Transit
    Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 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_69aed9477e8c81908bcb862d2db55b1d completed March 9, 2026, 2:29 p.m.
NER Named-entity recognition batch_69af0304702c8190899cbb0e3e41b987 completed March 9, 2026, 5:27 p.m.
NED1 Entity disambiguation (via context triple) batch_69b5961845488190827b03e161f1235e completed March 14, 2026, 5:08 p.m.
Created at: March 9, 2026, 3:45 p.m.