Triple

T19919919
Position Surface form Disambiguated ID Type / Status
Subject Dormont Junction station E478762 entity
Predicate partOfSystem P840 FINISHED
Object Pittsburgh Light Rail — NE NERFINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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: Pittsburgh Light Rail | Statement: [Dormont Junction station, partOfSystem, Pittsburgh Light Rail]

Disambiguation candidates (1 decision)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Pittsburgh Light Rail
Context triple: [Dormont Junction station, partOfSystem, Pittsburgh Light Rail]
  • A. Pittsburgh Light Rail chosen
    Pittsburgh Light Rail is a light rail transit system serving Pittsburgh, Pennsylvania and its nearby neighborhoods, providing urban and commuter rail service including access to the city’s North Shore district.
  • B. Pittsburgh Light Rail Red Line
    The Pittsburgh Light Rail Red Line is a major light rail route in Pittsburgh, Pennsylvania, connecting downtown with several southern neighborhoods and suburbs.
  • C. Pittsburgh Light Rail Blue Line
    The Pittsburgh Light Rail Blue Line is a light rail service in Pittsburgh, Pennsylvania, that connects downtown with various southern suburbs as part of the Port Authority’s “T” system.
  • D. Pittsburgh Light Rail Silver Line
    The Pittsburgh Light Rail Silver Line is a light rail service in Pittsburgh, Pennsylvania, that operates as part of the city's "T" system, connecting downtown with surrounding neighborhoods and suburbs.
  • E. Pittsburgh Light Rail subway trunk
    The Pittsburgh Light Rail subway trunk is the central underground segment of Pittsburgh’s light rail system that carries trains through the city’s downtown core.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 batches)

Stage Batch ID Job type Status
creating batch_69d8e521855c8190b41871700afc8d6a elicitation completed
NER batch_69e659c49d408190b3a42bada3675133 ner completed
Created at: April 10, 2026, 1:53 p.m.