Triple

T2921818
Position Surface form Disambiguated ID Type / Status
Subject Brooklyn–Manhattan Transit Corporation E78743 entity
Predicate operatedLine P848 FINISHED
Object BMT West End Line
The BMT West End Line is a New York City Subway line in Brooklyn that runs primarily along New Utrecht Avenue and serves as part of the modern D train route.
 E326284 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 West End Line | Statement: [Brooklyn–Manhattan Transit Corporation, operatedLine, BMT West End Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: BMT West End Line
Context triple: [Brooklyn–Manhattan Transit Corporation, operatedLine, BMT West End Line]
  • A. BMT Fourth Avenue Line
    The BMT Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn, running beneath Fourth Avenue and serving as a key corridor for multiple services.
  • B. BMT Myrtle Avenue Line
    The BMT Myrtle Avenue Line is a New York City Subway line in Brooklyn and Queens that primarily carries the M train along an elevated route.
  • C. BMT Canarsie Line
    The BMT Canarsie Line is a New York City Subway rapid transit line in Brooklyn and Manhattan, best known for being served by the L train and running crosstown under 14th Street.
  • D. 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.
  • E. BMT Archer Avenue Line
    The BMT Archer Avenue Line is a New York City Subway line in Queens that carries BMT services to and from the Jamaica Center–Parsons/Archer terminal.
  • 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 West End Line
Triple: [Brooklyn–Manhattan Transit Corporation, operatedLine, BMT West End Line]
Generated description
The BMT West End Line is a New York City Subway line in Brooklyn that runs primarily along New Utrecht Avenue and serves as part of the modern D train route.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: BMT West End Line
Target entity description: The BMT West End Line is a New York City Subway line in Brooklyn that runs primarily along New Utrecht Avenue and serves as part of the modern D train route.
  • A. BMT Fourth Avenue Line
    The BMT Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn, running beneath Fourth Avenue and serving as a key corridor for multiple services.
  • B. BMT Myrtle Avenue Line
    The BMT Myrtle Avenue Line is a New York City Subway line in Brooklyn and Queens that primarily carries the M train along an elevated route.
  • C. BMT Canarsie Line
    The BMT Canarsie Line is a New York City Subway rapid transit line in Brooklyn and Manhattan, best known for being served by the L train and running crosstown under 14th Street.
  • D. 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.
  • E. BMT Archer Avenue Line
    The BMT Archer Avenue Line is a New York City Subway line in Queens that carries BMT services to and from the Jamaica Center–Parsons/Archer terminal.
  • 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_69ad8b0c2ad081909ff87050ae542bb9 completed March 8, 2026, 2:43 p.m.
NER Named-entity recognition batch_69ad97bbcc7081908a79053be35ca02e completed March 8, 2026, 3:37 p.m.
NED1 Entity disambiguation (via context triple) batch_69b20339e9848190944c64f2f453e765 completed March 12, 2026, 12:05 a.m.
NEDg Description generation batch_69b2043430548190a538c183aef44b44 completed March 12, 2026, 12:09 a.m.
NED2 Entity disambiguation (via description) batch_69b204c812f081908fe5733305123c0e completed March 12, 2026, 12:11 a.m.
Created at: March 8, 2026, 2:54 p.m.