Triple

T41773
Position Surface form Disambiguated ID Type / Status
Subject South Acton E825 entity
Predicate connectsTo P845 FINISHED
Object Boston’s North Station (via Fitchburg Line)
Boston’s North Station (via Fitchburg Line) is a major MBTA commuter rail terminal in Boston that serves as the downtown endpoint for the Fitchburg Line and several other northside rail routes.
E3301 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: Boston’s North Station (via Fitchburg Line) | Statement: [South Acton, connectsTo, Boston’s North Station (via Fitchburg Line)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Boston’s North Station (via Fitchburg Line)
Context triple: [South Acton, connectsTo, Boston’s North Station (via Fitchburg Line)]
  • A. MBTA Fitchburg Line
    The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
  • B. MBTA Red Line
    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.
  • C. Belmont Center station
    Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
  • D. MBTA bus network
    The MBTA bus network is the system of public bus routes serving Cambridge and the greater Boston area as part of the Massachusetts Bay Transportation Authority’s regional transit services.
  • E. Boston, Massachusetts
    Boston, Massachusetts is a historic New England city and the capital of Massachusetts, known for its pivotal role in the American Revolution, prestigious universities, and cultural and economic influence.
  • 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: Boston’s North Station (via Fitchburg Line)
Triple: [South Acton, connectsTo, Boston’s North Station (via Fitchburg Line)]
Generated description
Boston’s North Station (via Fitchburg Line) is a major MBTA commuter rail terminal in Boston that serves as the downtown endpoint for the Fitchburg Line and several other northside rail routes.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Boston’s North Station (via Fitchburg Line)
Target entity description: Boston’s North Station (via Fitchburg Line) is a major MBTA commuter rail terminal in Boston that serves as the downtown endpoint for the Fitchburg Line and several other northside rail routes.
  • A. MBTA Fitchburg Line
    The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
  • B. MBTA Red Line
    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.
  • C. Belmont Center station
    Belmont Center station is a Massachusetts Bay Transportation Authority (MBTA) commuter rail stop located in the commercial center of Belmont, Massachusetts.
  • D. MBTA bus network
    The MBTA bus network is the system of public bus routes serving Cambridge and the greater Boston area as part of the Massachusetts Bay Transportation Authority’s regional transit services.
  • E. Boston, Massachusetts
    Boston, Massachusetts is a historic New England city and the capital of Massachusetts, known for its pivotal role in the American Revolution, prestigious universities, and cultural and economic influence.
  • 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_69a247a8f6c08190bac804906d62ed5a completed Feb. 28, 2026, 1:40 a.m.
NER Named-entity recognition batch_69a24ae0b7c4819092220568e8e52ad5 completed Feb. 28, 2026, 1:54 a.m.
NED1 Entity disambiguation (via context triple) batch_69a24e63a9848190a0f38b23521804e6 completed Feb. 28, 2026, 2:09 a.m.
NEDg Description generation batch_69a24efe21148190849accf51a2632f0 completed Feb. 28, 2026, 2:12 a.m.
NED2 Entity disambiguation (via description) batch_69a24fca983c8190a62b8820645d2d2c completed Feb. 28, 2026, 2:15 a.m.
Created at: Feb. 28, 2026, 1:46 a.m.