Triple

T4735754
Position Surface form Disambiguated ID Type / Status
Subject Fields Corner station E105121 entity
Predicate isInSystem P58477 FINISHED
Object MBTA subway system E118535 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 subway system | Statement: [Fields Corner station, isInSystem, MBTA subway system]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: MBTA subway system
Context triple: [Fields Corner station, isInSystem, MBTA 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. 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.
  • C. MBTA
    The MBTA (Massachusetts Bay Transportation Authority) is the public transit agency that operates subway, bus, commuter rail, and ferry services in the Greater Boston area.
  • D. MBTA
    MBTA is a landmark U.S. federal law enacted in 1918 that protects migratory bird species by prohibiting their unauthorized capture, killing, or trade.
  • E. 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.
  • 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: isInSystem
Context triple: [Fields Corner station, isInSystem, MBTA subway system]
  • A. isOnSystemMap
    Indicates that an entity is currently displayed or represented on a particular system map.
  • B. isInUse
    Indicates that an entity is currently being utilized or actively engaged in its intended function or operation.
  • C. usedBySystem
    Indicates that something is utilized or operated by a particular system.
  • D. introducedInSystem
    Indicates that an entity was first added, implemented, or made available within a particular system.
  • E. isOn
    Indicates that one entity is physically positioned above and in contact with the top surface of another entity.
  • 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_69bd43ee52048190b81a4f066534ffb3 completed March 20, 2026, 12:56 p.m.
NER Named-entity recognition batch_69bd648148b48190ae30631115339ba1 completed March 20, 2026, 3:15 p.m.
NED1 Entity disambiguation (via context triple) batch_69bf28f128f48190a8bdaf77b6ca6e15 completed March 21, 2026, 11:25 p.m.
PD Predicate disambiguation batch_69bd6221c3b881908604f35f8de6f16b completed March 20, 2026, 3:05 p.m.
PDg Predicate description generation batch_69bd637e19e081909e415544106c7835 completed March 20, 2026, 3:10 p.m.
Created at: March 20, 2026, 1:19 p.m.