Triple

T5249044
Position Surface form Disambiguated ID Type / Status
Subject Boston subway E118535 entity
Predicate openedFirstSection P20181 FINISHED
Object Tremont Street Subway E163466 NE FINISHED

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: Tremont Street Subway | Statement: [Boston subway, openedFirstSection, Tremont Street Subway]

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: Tremont Street Subway
Context triple: [Boston subway, openedFirstSection, Tremont Street Subway]
  • A. Tremont Street subway chosen
    The Tremont Street subway is the historic underground streetcar tunnel in downtown Boston that forms part of the MBTA Green Line and is recognized as the oldest subway tunnel in North America.
  • B. Degraves Street subway
    Degraves Street subway is an underground pedestrian passage in central Melbourne that links Flinders Street Station to Degraves Street and nearby laneways.
  • C. Archer Avenue Subway
    The Archer Avenue Subway is a New York City Subway extension in Queens that opened in the late 1980s to replace portions of the demolished elevated Jamaica Line and improve transit access to the Jamaica Center area.
  • D. Broad Street (BMT Nassau Street Line)
    Broad Street is a New York City Subway station in Lower Manhattan serving the BMT Nassau Street Line, primarily used by J and Z trains.
  • E. Pennsylvania Avenue (IRT New Lots Line)
    Pennsylvania Avenue is a local New York City Subway station on the IRT New Lots Line in Brownsville, Brooklyn, served by the 3 train.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 batches)

Stage Batch ID Job type Status
creating batch_69bd4468aacc8190a8196f71855cdf4f elicitation completed
NER batch_69bd7b787b34819081af96de9355bb4f ner completed
NED1 batch_69bef83998f881909fef2746f5c496af ned_source_triple completed
Created at: March 20, 2026, 1:50 p.m.