Triple

T7473049
Position Surface form Disambiguated ID Type / Status
Subject Braintree Branch of the Red Line E176554 entity
Predicate hasRollingStock P1305 FINISHED
Object MBTA Red Line 1800 series cars E358760 NE FINISHED

How this triple was built (2 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
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: MBTA Red Line 1800 series cars | Statement: [Braintree Branch of the Red Line, hasRollingStock, MBTA Red Line 1800 series cars]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: MBTA Red Line 1800 series cars
Context triple: [Braintree Branch of the Red Line, hasRollingStock, MBTA Red Line 1800 series cars]
  • A. MBTA Red Line 1800 series cars chosen
    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.
  • B. 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.
  • C. MBTA Red Line 1500/1600 series cars
    The MBTA Red Line 1500/1600 series cars are an older generation of heavy-rail subway vehicles that have long served Boston’s Red Line, particularly known for their stainless-steel bodies and traditional rapid-transit design.
  • D. 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.
  • E. MBTA Type 8 Light Rail Vehicle
    The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69c69f223fd88190b4c69b95d7cbeeda completed March 27, 2026, 3:15 p.m.
NER Named-entity recognition batch_69c6f416d018819098275cc51d8def3f completed March 27, 2026, 9:18 p.m.
NED1 Entity disambiguation (via context triple) batch_69c845f8b9a48190a21cac7fb98bf26d completed March 28, 2026, 9:19 p.m.
Created at: March 27, 2026, 3:41 p.m.