Triple

T10308911
Position Surface form Disambiguated ID Type / Status
Subject Myrtle–Wyckoff Avenues station (BMT Canarsie Line) E241834 entity
Predicate openedAsPartOf P9951 FINISHED
Object BMT Canarsie Line extension to 14th Street–Eastern District Terminal
The BMT Canarsie Line extension to 14th Street–Eastern District Terminal was an early 20th-century New York City Subway expansion project that extended the Canarsie Line deeper into Brooklyn and toward the East River waterfront, improving transit access for growing residential and industrial neighborhoods.
E133897 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 Canarsie Line extension to 14th Street–Eastern District Terminal | Statement: [Myrtle–Wyckoff Avenues station (BMT Canarsie Line), openedAsPartOf, BMT Canarsie Line extension to 14th Street–Eastern District Terminal]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: BMT Canarsie Line extension to 14th Street–Eastern District Terminal
Context triple: [Myrtle–Wyckoff Avenues station (BMT Canarsie Line), openedAsPartOf, BMT Canarsie Line extension to 14th Street–Eastern District Terminal]
  • A. IRT Nostrand Avenue Line extension
    The IRT Nostrand Avenue Line extension was a New York City Subway expansion project that extended service deeper into Brooklyn along Nostrand Avenue beyond its original terminus.
  • B. BMT Brighton Line at Coney Island–Stillwell Avenue
    BMT Brighton Line at Coney Island–Stillwell Avenue is a New York City Subway terminal complex in Brooklyn where the Brighton Line and several other lines converge at the large Coney Island–Stillwell Avenue station.
  • C. 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.
  • D. 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.
  • 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 Canarsie Line extension to 14th Street–Eastern District Terminal
Triple: [Myrtle–Wyckoff Avenues station (BMT Canarsie Line), openedAsPartOf, BMT Canarsie Line extension to 14th Street–Eastern District Terminal]
Generated description
The BMT Canarsie Line extension to 14th Street–Eastern District Terminal was an early 20th-century New York City Subway expansion project that extended the Canarsie Line deeper into Brooklyn and toward the East River waterfront, improving transit access for growing residential and industrial neighborhoods.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: BMT Canarsie Line extension to 14th Street–Eastern District Terminal
Target entity description: The BMT Canarsie Line extension to 14th Street–Eastern District Terminal was an early 20th-century New York City Subway expansion project that extended the Canarsie Line deeper into Brooklyn and toward the East River waterfront, improving transit access for growing residential and industrial neighborhoods.
  • A. IRT Nostrand Avenue Line extension
    The IRT Nostrand Avenue Line extension was a New York City Subway expansion project that extended service deeper into Brooklyn along Nostrand Avenue beyond its original terminus.
  • B. BMT Brighton Line at Coney Island–Stillwell Avenue
    BMT Brighton Line at Coney Island–Stillwell Avenue is a New York City Subway terminal complex in Brooklyn where the Brighton Line and several other lines converge at the large Coney Island–Stillwell Avenue station.
  • C. 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.
  • D. BMT Canarsie Line chosen
    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.
  • 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.

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_69d381ac38808190a8ca7457c85b625b completed April 6, 2026, 9:49 a.m.
NER Named-entity recognition batch_69d4d3291d848190a397356ad8058310 completed April 7, 2026, 9:49 a.m.
NED1 Entity disambiguation (via context triple) batch_69d71d7154b88190a0ae1dfa029b125e completed April 9, 2026, 3:30 a.m.
NEDg Description generation batch_69d73186831481909555e2205d8783a7 completed April 9, 2026, 4:56 a.m.
NED2 Entity disambiguation (via description) batch_69d732bfc76c819089287477b54a7b77 completed April 9, 2026, 5:01 a.m.
Created at: April 6, 2026, 11:47 a.m.