Triple

T15890420
Position Surface form Disambiguated ID Type / Status
Subject Ashmont–Braintree branch of the Red Line E385302 entity
Predicate connectsWith P37 FINISHED
Object MBTA Commuter Rail at JFK/UMass E177251 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 Commuter Rail at JFK/UMass | Statement: [Ashmont–Braintree branch of the Red Line, connectsWith, MBTA Commuter Rail at JFK/UMass]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: MBTA Commuter Rail at JFK/UMass
Context triple: [Ashmont–Braintree branch of the Red Line, connectsWith, MBTA Commuter Rail at JFK/UMass]
  • A. MBTA Commuter Rail (Old Colony Lines at JFK/UMass) chosen
    MBTA Commuter Rail (Old Colony Lines at JFK/UMass) is a set of commuter rail services connecting Boston’s JFK/UMass station to southeastern Massachusetts communities along the restored Old Colony rail corridors.
  • B. MBTA Commuter Rail at Braintree
    MBTA Commuter Rail at Braintree is a regional rail station in Braintree, Massachusetts, serving as a key stop on the MBTA’s commuter rail network that links the South Shore suburbs with downtown Boston.
  • C. MBTA Commuter Rail Kingston Line
    The MBTA Commuter Rail Kingston Line is a Massachusetts Bay Transportation Authority rail line providing commuter service between Boston and the South Shore, terminating in Kingston, Massachusetts.
  • D. MBTA Commuter Rail Franklin Line
    The MBTA Commuter Rail Franklin Line is a regional rail line in the Greater Boston area that provides passenger service between Boston and communities to the southwest, including Franklin.
  • E. MBTA Commuter Rail Greenbush Line
    The MBTA Commuter Rail Greenbush Line is a Massachusetts Bay Transportation Authority commuter rail route connecting Boston’s South Station with coastal South Shore communities, including towns such as Hingham, Cohasset, and Scituate.
  • 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_69d86da5b800819083a31be937d738b0 completed April 10, 2026, 3:25 a.m.
NER Named-entity recognition batch_69e1561e5ac481908ead7de3140c769d completed April 16, 2026, 9:35 p.m.
NED1 Entity disambiguation (via context triple) batch_69ffb047b6248190b6c11ef20636f50f completed May 9, 2026, 10:08 p.m.
Created at: April 10, 2026, 4:51 a.m.