Triple

T145756
Position Surface form Disambiguated ID Type / Status
Subject Alewife station E3325 entity
Predicate isNorthernTerminusOf P3375 FINISHED
Object MBTA Red Line E761 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: MBTA Red Line | Statement: [Alewife station, isNorthernTerminusOf, MBTA Red Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: MBTA Red Line
Context triple: [Alewife station, isNorthernTerminusOf, MBTA Red Line]
  • A. MBTA Red Line chosen
    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.
  • B. MBTA Orange Line
    The MBTA Orange Line is a rapid transit line in the Boston metropolitan area that runs roughly north–south, connecting neighborhoods such as Jamaica Plain, Downtown Boston, and Malden.
  • C. MBTA Blue Line
    The MBTA Blue Line is a rapid transit line in the Boston metropolitan area that runs primarily along the city’s northeastern corridor, connecting downtown Boston with East Boston, Logan Airport, and Revere.
  • D. MBTA Green Line
    The MBTA Green Line is a light rail service in Boston, Massachusetts, known as one of the oldest subway lines in the United States and serving key neighborhoods, universities, and cultural destinations across the city.
  • E. MBTA Silver Line
    The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
  • 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: isNorthernTerminusOf
Context triple: [Alewife station, isNorthernTerminusOf, MBTA Red Line]
  • A. terminusNorth chosen
    Indicates that one entity serves as the northern endpoint or final stop of another entity, such as a route, line, or path.
  • B. terminusEast
    Indicates that one entity serves as the eastern endpoint or final stop of another entity, such as a route, line, or path.
  • C. terminusCity
    Indicates that a transportation route or service ends or has its final stop in a particular city.
  • D. westernTerminusNear
    Indicates that the western endpoint of one entity is located close to another entity.
  • E. railwayLine
    Indicates that there is a railway line connection or route associated with or passing through the referenced entity.
  • 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_69a252868de4819080e21c9938bfe8b6 completed Feb. 28, 2026, 2:27 a.m.
NER Named-entity recognition batch_69a257ea7eac8190884a53453a9e0dd6 completed Feb. 28, 2026, 2:50 a.m.
NED1 Entity disambiguation (via context triple) batch_69a40acd14dc8190a9ab1a5e826a283a completed March 1, 2026, 9:45 a.m.
PD Predicate disambiguation batch_69a25656a4fc81908a87678ac3d28f93 completed Feb. 28, 2026, 2:43 a.m.
Created at: Feb. 28, 2026, 2:31 a.m.