Triple

T6255086
Position Surface form Disambiguated ID Type / Status
Subject Mattapan Line E140142 entity
Predicate terminus P388 FINISHED
Object Ashmont station E107799 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: Ashmont station | Statement: [Mattapan Line, terminus, Ashmont station]

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: Ashmont station
Context triple: [Mattapan Line, terminus, Ashmont station]
  • A. Ashmont station chosen
    Ashmont station is a major MBTA transit hub in Boston’s Dorchester neighborhood, serving as the southern terminus of the Red Line’s Ashmont branch and the connection point to the Mattapan trolley line.
  • B. Coolidge Corner station
    Coolidge Corner station is a light rail stop on the MBTA Green Line in Brookline, Massachusetts, serving the busy commercial and residential Coolidge Corner neighborhood.
  • C. Savin Hill station
    Savin Hill station is a rapid transit stop on the Massachusetts Bay Transportation Authority's Red Line serving the Savin Hill neighborhood of Dorchester in Boston, Massachusetts.
  • D. Brookline Village station
    Brookline Village station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in the Brookline neighborhood just outside Boston.
  • E. Chestnut Hill station
    Chestnut Hill station is a Massachusetts Bay Transportation Authority light rail stop on the Green Line serving the Chestnut Hill neighborhood of Newton, Massachusetts.
  • 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_69c008b4858c819095b0199114a9a87b elicitation completed
NER batch_69c06363d6008190bf05e003b1f74497 ner completed
NED1 batch_69c6537daf648190b40329e2a5934c09 ned_source_triple completed
Created at: March 22, 2026, 4:24 p.m.