Triple

T269503
Position Surface form Disambiguated ID Type / Status
Subject MBTA Green Line D branch E5598 entity
Predicate connectsWith P37 FINISHED
Object MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)
MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne) is a regional rail stop in Boston’s Fenway area that provides commuter rail access near Fenway Park and connects with the Green Line D branch.
 E34907 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: MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne) | Statement: [MBTA Green Line D branch, connectsWith, MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)
Context triple: [MBTA Green Line D branch, connectsWith, MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)]
  • A. 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.
  • B. MBTA Green Line D branch (nearby stations)
    The MBTA Green Line D branch is a light rail line in Greater Boston that runs between downtown Boston and several western suburbs, including Newton, providing frequent local transit service.
  • C. 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.
  • D. MBTA Commuter Rail network
    The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
  • E. MBTA Waverley
    MBTA Waverley is a commuter rail station in Belmont, Massachusetts, served by the Massachusetts Bay Transportation Authority’s Fitchburg Line.
  • 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: MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)
Triple: [MBTA Green Line D branch, connectsWith, MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)]
Generated description
MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne) is a regional rail stop in Boston’s Fenway area that provides commuter rail access near Fenway Park and connects with the Green Line D branch.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne)
Target entity description: MBTA Commuter Rail at Fenway station (nearby Yawkey/Lansdowne) is a regional rail stop in Boston’s Fenway area that provides commuter rail access near Fenway Park and connects with the Green Line D branch.
  • A. 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.
  • B. MBTA Green Line D branch (nearby stations)
    The MBTA Green Line D branch is a light rail line in Greater Boston that runs between downtown Boston and several western suburbs, including Newton, providing frequent local transit service.
  • C. 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.
  • D. MBTA Commuter Rail network
    The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
  • E. MBTA Waverley
    MBTA Waverley is a commuter rail station in Belmont, Massachusetts, served by the Massachusetts Bay Transportation Authority’s Fitchburg Line.
  • 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_69a38b9220f08190a94ffd00bb7425fd completed March 1, 2026, 12:42 a.m.
NEDg Description generation batch_69a38cb1d5808190b548efd55de09523 completed March 1, 2026, 12:47 a.m.
NED2 Entity disambiguation (via description) batch_69a38d10782c8190beead28963b003ab completed March 1, 2026, 12:49 a.m.
Created at: Feb. 28, 2026, 2:57 a.m.