Triple

T5853194
Position Surface form Disambiguated ID Type / Status
Subject Central Avenue station E130085 entity
Predicate historicalLineName P17520 FINISHED
Object Ashmont–Mattapan High-Speed Line E81387 NE FINISHED

How this triple was built (3 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: Ashmont–Mattapan High-Speed Line | Statement: [Central Avenue station, historicalLineName, Ashmont–Mattapan High-Speed Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Ashmont–Mattapan High-Speed Line
Context triple: [Central Avenue station, historicalLineName, Ashmont–Mattapan High-Speed Line]
  • A. MBTA Mattapan High-Speed Line chosen
    The MBTA Mattapan High-Speed Line is a light rail trolley service in the Boston area that operates historic PCC streetcars between Ashmont Station in Dorchester and Mattapan, serving communities including Milton, Massachusetts.
  • B. MBTA Ashmont Branch
    The MBTA Ashmont Branch is a rapid transit line of Boston’s Red Line that runs from JFK/UMass station through Dorchester to Ashmont, serving several southern neighborhoods of the city.
  • C. Mattapan High-Speed Line
    The Mattapan High-Speed Line is a light rail transit line in Boston, Massachusetts, operating historic trolley cars between Ashmont and Mattapan stations as part of the MBTA system.
  • D. MBTA Needham Line
    The MBTA Needham Line is a commuter rail route in the Greater Boston area that connects Boston’s South Station with the suburb of Needham, serving intermediate communities along the way.
  • E. 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.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: historicalLineName
Context triple: [Central Avenue station, historicalLineName, Ashmont–Mattapan High-Speed Line]
  • A. formerLineName chosen
    Indicates that the object is a previous or former name by which the referenced line was known.
  • B. lineName
    Indicates the specific name or designation assigned to a particular line (such as a route, path, or service) that distinguishes it from other lines.
  • C. historicalNameType
    Indicates that the relationship specifies the type or category of a historical name associated with an entity.
  • D. regionHistoricalName
    Indicates that a region has been known by a particular historical name during some past period.
  • E. historicalTerminus
    Indicates that one entity serves as the historically recognized endpoint or final limit of another entity, such as a route, period, or process.
  • F. None of above.

Provenance (4 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_69c0084de39081909eb34e6bed74215a completed March 22, 2026, 3:18 p.m.
NER Named-entity recognition batch_69c044ab0a048190b84be40fb13c0f50 completed March 22, 2026, 7:36 p.m.
NED1 Entity disambiguation (via context triple) batch_69c0b1007bbc81908963d3d14c9210c5 completed March 23, 2026, 3:18 a.m.
PD Predicate disambiguation batch_69c03345ca0c819081c81148d054fed2 completed March 22, 2026, 6:21 p.m.
Created at: March 22, 2026, 3:55 p.m.