Triple

T41661
Position Surface form Disambiguated ID Type / Status
Subject Shirley, Massachusetts E821 entity
Predicate railOperator P522 FINISHED
Object Massachusetts Bay Transportation Authority 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: Massachusetts Bay Transportation Authority | Statement: [Shirley, Massachusetts, railOperator, Massachusetts Bay Transportation Authority]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Massachusetts Bay Transportation Authority
Context triple: [Shirley, Massachusetts, railOperator, Massachusetts Bay Transportation Authority]
  • 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 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.
  • C. 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.
  • D. 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.
  • E. Metropolitan Transit Authority
    The Metropolitan Transit Authority was a former public agency that operated and managed mass transit services in the Boston metropolitan area before being succeeded by the MBTA.
  • 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: railOperator
Context triple: [Shirley, Massachusetts, railOperator, Massachusetts Bay Transportation Authority]
  • A. trains
    Indicates that one entity teaches, instructs, or coaches another entity to develop skills, knowledge, or abilities.
  • B. servedByRailroad
    Indicates that a location or facility is provided with transportation or service by a railroad line or company.
  • C. railwayLine
    Indicates that there is a railway line connection or route associated with or passing through the referenced entity.
  • D. hasRailSystem chosen
    Indicates that an entity possesses or is served by a rail-based transportation system.
  • E. hasRailStation
    Indicates that one entity possesses, contains, or is served by a rail station.
  • 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_69a247a8f6c08190bac804906d62ed5a completed Feb. 28, 2026, 1:40 a.m.
NER Named-entity recognition batch_69a24db9527c8190816b6b25c88cb2f4 completed Feb. 28, 2026, 2:06 a.m.
NED1 Entity disambiguation (via context triple) batch_69a32f24e3888190b99dd0eb4b18db4a completed Feb. 28, 2026, 6:08 p.m.
PD Predicate disambiguation batch_69a24ab8a8908190beec6da6694dd4c9 completed Feb. 28, 2026, 1:54 a.m.
Created at: Feb. 28, 2026, 1:46 a.m.