Triple

T19044451
Position Surface form Disambiguated ID Type / Status
Subject Mattapan Square E466093 entity
Predicate hasTransitConnection P3791 FINISHED
Object MBTA Red Line via Ashmont–Mattapan High-Speed Line NE NERFINISHED

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 via Ashmont–Mattapan High-Speed Line | Statement: [Mattapan Square, hasTransitConnection, MBTA Red Line via Ashmont–Mattapan High-Speed Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: MBTA Red Line via Ashmont–Mattapan High-Speed Line
Context triple: [Mattapan Square, hasTransitConnection, MBTA Red Line via Ashmont–Mattapan High-Speed Line]
  • A. MBTA Red Line chosen
    The MBTA Red Line is a major rapid transit line in the Boston metropolitan area that runs through key communities including Cambridge, connecting them to downtown Boston and other parts of the region.
  • B. MBTA Green Line main line
    The MBTA Green Line main line is the core light rail trunk of Boston’s Green Line system, running through central Boston and connecting multiple branches that serve surrounding neighborhoods and suburbs.
  • C. MBTA Green Line A branch
    The MBTA Green Line A branch was a former light rail line in Boston and its western suburbs that once ran between downtown and Watertown before being replaced by bus service.
  • D. MBTA Blue Line
    The MBTA Blue Line is a rapid transit line in the Boston metropolitan area that runs primarily along the city’s northeastern corridor, connecting downtown Boston with East Boston, Logan Airport, and Revere.
  • E. MBTA Orange Line
    The MBTA Orange Line is a rapid transit line in the Boston metropolitan area that runs roughly north–south, connecting neighborhoods such as Jamaica Plain, Downtown Boston, and Malden.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 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_69d8dd0359648190bc2a9202c5cf29d2 completed April 10, 2026, 11:20 a.m.
NER Named-entity recognition batch_69e5d802a75c8190a4ce45e5fbffc1b7 completed April 20, 2026, 7:38 a.m.
Created at: April 10, 2026, 12:03 p.m.