Triple

T7382338
Position Surface form Disambiguated ID Type / Status
Subject MBTA Commuter Rail Zone 1A E170289 entity
Predicate introducedBy P513 FINISHED
Object Massachusetts Bay Transportation Authority E2866 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: Massachusetts Bay Transportation Authority | Statement: [MBTA Commuter Rail Zone 1A, introducedBy, Massachusetts Bay Transportation Authority]

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: Massachusetts Bay Transportation Authority
Context triple: [MBTA Commuter Rail Zone 1A, introducedBy, Massachusetts Bay Transportation Authority]
  • A. MBTA chosen
    The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
  • B. MBTA
    MBTA is a landmark U.S. federal law enacted in 1918 that protects migratory bird species by prohibiting their unauthorized capture, killing, or trade.
  • C. Massachusetts Bay Transportation Trust Fund
    The Massachusetts Bay Transportation Trust Fund is a dedicated financial resource used to support and sustain public transportation services in Massachusetts.
  • D. MetroWest Regional Transit Authority
    MetroWest Regional Transit Authority is a public transportation agency that operates local bus and paratransit services in the MetroWest region of Massachusetts.
  • E. Cape Cod Regional Transit Authority
    The Cape Cod Regional Transit Authority is a public transportation agency that operates bus and paratransit services throughout Cape Cod, 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_69c68a5d0ed08190b6d361e68f813330 elicitation completed
NER batch_69c6f1c9a3c48190972126c19aa31dca ner completed
NED1 batch_69c802db77988190aacc4e2f9cbb0bb3 ned_source_triple completed
Created at: March 27, 2026, 3:08 p.m.