Triple

T893802
Position Surface form Disambiguated ID Type / Status
Subject R train E19297 entity
Predicate historicalPredecessor P97 FINISHED
Object BMT 2 (Fourth Avenue Local)
BMT 2 (Fourth Avenue Local) was a former Brooklyn–Manhattan Transit Corporation subway service that operated local trains along Brooklyn’s Fourth Avenue Line in New York City.
E106043 NE FINISHED

How this triple was built (4 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: BMT 2 (Fourth Avenue Local) | Statement: [R train, historicalPredecessor, BMT 2 (Fourth Avenue Local)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: BMT 2 (Fourth Avenue Local)
Context triple: [R train, historicalPredecessor, BMT 2 (Fourth Avenue Local)]
  • A. BMT Nassau Street Line
    The BMT Nassau Street Line is a New York City Subway line in Lower Manhattan that primarily carries J and Z trains through the Financial District.
  • B. BMT Broadway Line
    The BMT Broadway Line is a major New York City Subway trunk line in Manhattan, carrying N, Q, R, and W trains through Midtown and Lower Manhattan via Broadway.
  • C. New York City Subway B line
    The New York City Subway B line is an express service in the IND Sixth Avenue Line that runs through Manhattan and Brooklyn, serving major destinations including Yankee Stadium in the Bronx during certain times.
  • D. Nostrand Avenue Line
    The Nostrand Avenue Line is a New York City Subway route in Brooklyn that branches off the IRT Eastern Parkway Line to serve neighborhoods along Nostrand Avenue, terminating at Flatbush Avenue–Brooklyn College.
  • E. New Lots Line
    The New Lots Line is a New York City Subway line in Brooklyn that serves the easternmost portion of the IRT system, terminating at New Lots Avenue.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: BMT 2 (Fourth Avenue Local)
Triple: [R train, historicalPredecessor, BMT 2 (Fourth Avenue Local)]
Generated description
BMT 2 (Fourth Avenue Local) was a former Brooklyn–Manhattan Transit Corporation subway service that operated local trains along Brooklyn’s Fourth Avenue Line in New York City.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: BMT 2 (Fourth Avenue Local)
Target entity description: BMT 2 (Fourth Avenue Local) was a former Brooklyn–Manhattan Transit Corporation subway service that operated local trains along Brooklyn’s Fourth Avenue Line in New York City.
  • A. BMT Nassau Street Line
    The BMT Nassau Street Line is a New York City Subway line in Lower Manhattan that primarily carries J and Z trains through the Financial District.
  • B. BMT Broadway Line
    The BMT Broadway Line is a major New York City Subway trunk line in Manhattan, carrying N, Q, R, and W trains through Midtown and Lower Manhattan via Broadway.
  • C. New York City Subway B line
    The New York City Subway B line is an express service in the IND Sixth Avenue Line that runs through Manhattan and Brooklyn, serving major destinations including Yankee Stadium in the Bronx during certain times.
  • D. Nostrand Avenue Line
    The Nostrand Avenue Line is a New York City Subway route in Brooklyn that branches off the IRT Eastern Parkway Line to serve neighborhoods along Nostrand Avenue, terminating at Flatbush Avenue–Brooklyn College.
  • E. New Lots Line
    The New Lots Line is a New York City Subway line in Brooklyn that serves the easternmost portion of the IRT system, terminating at New Lots Avenue.
  • 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_69a4939d37188190848be3d426ebc9ae completed March 1, 2026, 7:29 p.m.
NER Named-entity recognition batch_69a4ad212cd8819091eb1b7d606f5afd completed March 1, 2026, 9:18 p.m.
NED1 Entity disambiguation (via context triple) batch_69a7c02772208190ac86dd885728e89c completed March 4, 2026, 5:16 a.m.
NEDg Description generation batch_69a7c2f036548190bc018c0cbe02d0ca completed March 4, 2026, 5:28 a.m.
NED2 Entity disambiguation (via description) batch_69a7c38925b481909133a1b098b08fa9 completed March 4, 2026, 5:30 a.m.
Created at: March 1, 2026, 7:39 p.m.