Triple

T893794
Position Surface form Disambiguated ID Type / Status
Subject R train E19297 entity
Predicate lineUsed P6301 FINISHED
Object 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.
 E146681 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 Fourth Avenue Line | Statement: [R train, lineUsed, BMT Fourth Avenue Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: BMT Fourth Avenue Line
Context triple: [R train, lineUsed, BMT Fourth Avenue Line]
  • A. 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.
  • 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. 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 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.
  • E. 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.
  • 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 Fourth Avenue Line
Triple: [R train, lineUsed, BMT Fourth Avenue Line]
Generated description
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.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: BMT Fourth Avenue Line
Target entity description: 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.
  • A. 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.
  • 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. 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 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.
  • E. 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.
  • 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_69aca2d3cb588190882a480c18147384 completed March 7, 2026, 10:12 p.m.
NEDg Description generation batch_69aca556501c8190abd8ae1cd679919a completed March 7, 2026, 10:23 p.m.
NED2 Entity disambiguation (via description) batch_69aca7753da0819098e50ae51e967eb5 completed March 7, 2026, 10:32 p.m.
Created at: March 1, 2026, 7:39 p.m.