Triple

T269494
Position Surface form Disambiguated ID Type / Status
Subject MBTA Green Line D branch E5598 entity
Predicate hasStation P35 FINISHED
Object Chestnut Hill station (MBTA Green Line D)
Chestnut Hill station is a light rail stop on Boston’s MBTA Green Line D branch serving the Chestnut Hill neighborhood with access to nearby residential and commercial areas.
 E56833 NE FINISHED

How this triple was built (4 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: Chestnut Hill station (MBTA Green Line D) | Statement: [MBTA Green Line D branch, hasStation, Chestnut Hill station (MBTA Green Line D)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Chestnut Hill station (MBTA Green Line D)
Context triple: [MBTA Green Line D branch, hasStation, Chestnut Hill station (MBTA Green Line D)]
  • A. MBTA Silver Hill station
    MBTA Silver Hill station is a small commuter rail stop on the Massachusetts Bay Transportation Authority’s Fitchburg Line serving the Silver Hill neighborhood of Weston, Massachusetts.
  • B. Brookline Hills station
    Brookline Hills station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in Brookline, Massachusetts, serving local commuters and nearby schools and neighborhoods.
  • C. Boylston station
    Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
  • D. Wellington Station (MBTA)
    Wellington Station (MBTA) is an Orange Line rapid transit station in Medford, Massachusetts, serving as a key park-and-ride and bus transfer hub just north of downtown Boston.
  • E. Brookline Village station
    Brookline Village station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in the Brookline neighborhood just outside Boston.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Chestnut Hill station (MBTA Green Line D)
Triple: [MBTA Green Line D branch, hasStation, Chestnut Hill station (MBTA Green Line D)]
Generated description
Chestnut Hill station is a light rail stop on Boston’s MBTA Green Line D branch serving the Chestnut Hill neighborhood with access to nearby residential and commercial areas.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Chestnut Hill station (MBTA Green Line D)
Target entity description: Chestnut Hill station is a light rail stop on Boston’s MBTA Green Line D branch serving the Chestnut Hill neighborhood with access to nearby residential and commercial areas.
  • A. MBTA Silver Hill station
    MBTA Silver Hill station is a small commuter rail stop on the Massachusetts Bay Transportation Authority’s Fitchburg Line serving the Silver Hill neighborhood of Weston, Massachusetts.
  • B. Brookline Hills station
    Brookline Hills station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in Brookline, Massachusetts, serving local commuters and nearby schools and neighborhoods.
  • C. Boylston station
    Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
  • D. Wellington Station (MBTA)
    Wellington Station (MBTA) is an Orange Line rapid transit station in Medford, Massachusetts, serving as a key park-and-ride and bus transfer hub just north of downtown Boston.
  • E. Brookline Village station
    Brookline Village station is a light rail stop on the Massachusetts Bay Transportation Authority’s Green Line in the Brookline neighborhood just outside Boston.
  • F. None of above. chosen

Provenance (5 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_69a25853594c8190b05ec3a586ec88bf completed Feb. 28, 2026, 2:52 a.m.
NER Named-entity recognition batch_69a25db00ed48190be6f598807265356 completed Feb. 28, 2026, 3:14 a.m.
NED1 Entity disambiguation (via context triple) batch_69a447f722808190874ec3f4692af179 completed March 1, 2026, 2:06 p.m.
NEDg Description generation batch_69a448693f308190990ea9ac33117ffe completed March 1, 2026, 2:08 p.m.
NED2 Entity disambiguation (via description) batch_69a448bd4ff08190aacf6fb8517f3244 completed March 1, 2026, 2:10 p.m.
Created at: Feb. 28, 2026, 2:57 a.m.