Triple

T4056325
Position Surface form Disambiguated ID Type / Status
Subject MBTA Commuter Rail coaches E84701 entity
Predicate operatedOn P2572 FINISHED
Object Middleborough/Lakeville Line E226950 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: Middleborough/Lakeville Line | Statement: [MBTA Commuter Rail coaches, operatedOn, Middleborough/Lakeville Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Middleborough/Lakeville Line
Context triple: [MBTA Commuter Rail coaches, operatedOn, Middleborough/Lakeville Line]
  • A. Middleborough/Lakeville Line chosen
    The Middleborough/Lakeville Line is a Massachusetts Bay Transportation Authority commuter rail route serving Boston and southeastern Massachusetts communities including Middleborough and Lakeville.
  • B. Mattapan Line
    The Mattapan Line is a light rail trolley service in Boston, Massachusetts, operating as part of the MBTA's Red Line system between Ashmont and Mattapan.
  • C. Lowell Line
    The Lowell Line is a Massachusetts Bay Transportation Authority commuter rail route that runs between Boston’s North Station and the city of Lowell, serving communities in the Merrimack Valley.
  • D. Green Line West Branch
    The Green Line West Branch is a segment of Chicago's 'L' rapid transit system that carries Green Line trains between Harlem/Lake and Ashland/63rd on the city's West Side.
  • E. Franklin/Foxboro Line
    The Franklin/Foxboro Line is a Massachusetts Bay Transportation Authority commuter rail route serving Boston and its southwestern suburbs, including Franklin and Foxborough.
  • 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_69aed933bec881909edfa28ebb69c634 completed March 9, 2026, 2:29 p.m.
NER Named-entity recognition batch_69aefbad953c81909d7b42fae5db9f25 completed March 9, 2026, 4:56 p.m.
NED1 Entity disambiguation (via context triple) batch_69bf9f4cba048190afe8aa775fa81e5a completed March 22, 2026, 7:50 a.m.
Created at: March 9, 2026, 3:38 p.m.