Triple

T21257776
Position Surface form Disambiguated ID Type / Status
Subject MBTA rapid transit zone E523913 entity
Predicate appliesTo P1129 FINISHED
Object Boston subway system NE NERFINISHED

How this triple was built (2 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 subway system | Statement: [MBTA rapid transit zone, appliesTo, Boston subway system]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Boston subway system
Context triple: [MBTA rapid transit zone, appliesTo, Boston subway system]
  • A. Boston subway chosen
    The Boston subway, officially known as the MBTA or "the T," is one of the oldest public transit systems in the United States, serving the Greater Boston area with an extensive network of underground and surface rail lines.
  • B. Philadelphia subway system
    The Philadelphia subway system is the rapid transit network serving Philadelphia, Pennsylvania, primarily operated by SEPTA and consisting of multiple underground and elevated lines that connect the city and surrounding areas.
  • C. 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.
  • 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. Boston transportation network
    The Boston transportation network is an integrated system of subway, commuter rail, bus, and roadway infrastructure that connects neighborhoods within Boston and links the city to the greater New England region.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 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_69e0b5146c108190adc9adb73e90abff completed April 16, 2026, 10:08 a.m.
NER Named-entity recognition batch_69e735e2f1d48190b566ab4d736fdbc4 completed April 21, 2026, 8:31 a.m.
Created at: April 16, 2026, 3:58 p.m.