BMT Sea Beach Line
E138881
The BMT Sea Beach Line is a New York City Subway line in Brooklyn that runs largely in an open-cut trench and primarily carries the N service between Coney Island and Manhattan.
All labels observed (7)
How this entity was disambiguated
This entity first appeared as the object of triple T851557 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: BMT Sea Beach Line Context triple: [N train, usesLine, BMT Sea Beach Line]
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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.
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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.
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C.
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.
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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.
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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.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: BMT Sea Beach Line Target entity description: The BMT Sea Beach Line is a New York City Subway line in Brooklyn that runs largely in an open-cut trench and primarily carries the N service between Coney Island and Manhattan.
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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.
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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.
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C.
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.
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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.
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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
Statements (47)
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: BMT Sea Beach Line Description of subject: The BMT Sea Beach Line is a New York City Subway line in Brooklyn that runs largely in an open-cut trench and primarily carries the N service between Coney Island and Manhattan.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Brooklyn–Manhattan Transit Corporation
this entity surface form:
Sea Beach Line local/express in Brooklyn (historically)
this entity surface form:
BMT Sea Beach Line tracks
this entity surface form:
Sea Beach Line (Brooklyn)
this entity surface form:
BMT Sea Beach Line (N)
subject surface form:
Southern Brooklyn
this entity surface form:
BMT Sea Beach Line (N train)
this entity surface form:
Sea Beach Line (via Coney Island–Stillwell Avenue)
this entity surface form:
BMT Sea Beach Line (N train)