Triple

T7565430
Position Surface form Disambiguated ID Type / Status
Subject Fitchburg Line E178900 entity
Predicate usesRollingStock P5426 FINISHED
Object MBTA single-level coaches E84701 NE FINISHED

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: MBTA single-level coaches
Context triple: [Fitchburg Line, usesRollingStock, MBTA single-level coaches]
  • A. MBTA Commuter Rail coaches chosen
    MBTA Commuter Rail coaches are bi-level and single-level passenger railcars used by the Massachusetts Bay Transportation Authority to provide regional rail service across Greater Boston and surrounding areas.
  • B. MBTA Type 7 Light Rail Vehicle
    The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
  • C. MBTA Type 9 Light Rail Vehicle
    The MBTA Type 9 Light Rail Vehicle is a modern, low-floor streetcar used on Boston’s Green Line that features improved accessibility, passenger comfort, and energy efficiency compared to earlier MBTA light rail fleets.
  • D. MBTA Red Line 1800 series cars
    The MBTA Red Line 1800 series cars are a fleet of heavy-rail subway vehicles used on Boston’s Red Line, featuring stainless-steel bodies and modernized interiors compared to earlier generations of MBTA rolling stock.
  • E. MBTA Red Line 1700 series cars
    The MBTA Red Line 1700 series cars are a fleet of heavy-rail subway vehicles used on Boston’s Red Line, particularly associated with service on the Braintree Branch.
  • 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_69c69f2f80288190b95cceb4da92ab2b elicitation completed
NER batch_69c6f8fde87c81909795fc713d7378ff ner completed
NED1 batch_69c8615c98808190a9dd598846a598b2 ned_source_triple completed
Created at: March 27, 2026, 3:50 p.m.