Triple

T1013178
Position Surface form Disambiguated ID Type / Status
Subject Metropolitan Transit Authority (Boston) E21867 entity
Predicate successorTransitBrand P6643 FINISHED
Object MBTA E2866 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 | Statement: [Metropolitan Transit Authority (Boston), successorTransitBrand, MBTA]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: MBTA
Context triple: [Metropolitan Transit Authority (Boston), successorTransitBrand, MBTA]
  • A. MBTA chosen
    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.
  • 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 AFC 2.0
    MBTA AFC 2.0 is the Massachusetts Bay Transportation Authority’s next-generation automated fare collection system designed to modernize how riders pay for and access public transit across Greater Boston.
  • D. 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.
  • E. 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.
  • 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: successorTransitBrand
Context triple: [Metropolitan Transit Authority (Boston), successorTransitBrand, MBTA]
  • A. successorBranding chosen
    Indicates that one brand has replaced or continued another brand as its subsequent or updated identity.
  • B. successorInMarket
    Indicates that one entity has taken over or followed another in serving the same market or customer base.
  • C. successorModel
    Indicates that one model is the direct follow-up or replacement for another earlier model.
  • D. succeededByCompanyName
    Indicates that one company is followed or replaced by another company as its successor.
  • E. formerBrand
    Indicates that an entity was previously used or recognized as a brand for another entity but is no longer its current brand.
  • 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_69a493c68e24819080ed0ee8bcfd5ce0 completed March 1, 2026, 7:30 p.m.
NER Named-entity recognition batch_69a4b7be907c8190b5c6ea89257755a7 completed March 1, 2026, 10:03 p.m.
NED1 Entity disambiguation (via context triple) batch_69adc977276881908405e2411eb14fa1 completed March 8, 2026, 7:09 p.m.
PD Predicate disambiguation batch_69a4b72207c08190a3dbb2aa7acbbc71 completed March 1, 2026, 10:01 p.m.
Created at: March 1, 2026, 7:41 p.m.