R train
E19297
The R train is a local service on the New York City Subway that runs through Queens, Manhattan, and Brooklyn along the Broadway and Fourth Avenue lines.
All labels observed (1)
| Label | Occurrences |
|---|---|
| R train canonical | 27 |
How this entity was disambiguated
This entity first appeared as the object of triple T23959 — 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: R train Context triple: [New York City Subway, hasLine, R train]
-
A.
C train
The C train is a local service on the New York City Subway’s Eighth Avenue Line, running primarily between Upper Manhattan and Brooklyn.
-
B.
Q train
The Q train is a New York City Subway service that runs along the BMT Broadway Line in Manhattan and the Brighton Line in Brooklyn, connecting neighborhoods like Astoria, Midtown, and Coney Island.
-
C.
E train
The E train is a New York City Subway service that runs primarily along the IND Eighth Avenue Line, providing rapid transit between Queens and Manhattan.
-
D.
5 train
The 5 train is a New York City Subway service that runs primarily along the IRT Lexington Avenue Line in Manhattan and the Eastern Parkway and Dyre Avenue lines in the Bronx, providing both local and express service.
-
E.
4 train
The 4 train is a New York City Subway service that runs along the Lexington Avenue Line in Manhattan, providing express service between the Bronx and Brooklyn.
- 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: R train Target entity description: The R train is a local service on the New York City Subway that runs through Queens, Manhattan, and Brooklyn along the Broadway and Fourth Avenue lines.
-
A.
C train
The C train is a local service on the New York City Subway’s Eighth Avenue Line, running primarily between Upper Manhattan and Brooklyn.
-
B.
Q train
The Q train is a New York City Subway service that runs along the BMT Broadway Line in Manhattan and the Brighton Line in Brooklyn, connecting neighborhoods like Astoria, Midtown, and Coney Island.
-
C.
E train
The E train is a New York City Subway service that runs primarily along the IND Eighth Avenue Line, providing rapid transit between Queens and Manhattan.
-
D.
5 train
The 5 train is a New York City Subway service that runs primarily along the IRT Lexington Avenue Line in Manhattan and the Eastern Parkway and Dyre Avenue lines in the Bronx, providing both local and express service.
-
E.
4 train
The 4 train is a New York City Subway service that runs along the Lexington Avenue Line in Manhattan, providing express service between the Bronx and Brooklyn.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway service
ⓘ
rapid transit service ⓘ |
| accessibility | partially accessible (only some stations accessible) ⓘ |
| boroughServed |
Brooklyn
ⓘ
Manhattan ⓘ Queens ⓘ |
| city | New York City ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depotUsed |
Coney Island Yard (for much of its fleet, subject to change)
ⓘ
Jamaica Yard ⓘ
surface form:
Jamaica Yard (historically and/or for some consists)
|
| division |
B Division
ⓘ
IND ⓘ
surface form:
IND/BMT
|
| electrification | 600 V DC third rail ⓘ |
| fareMedium |
MetroCard
ⓘ
OMNY ⓘ |
| fareSystem | Metropolitan Transportation Authority fare system ⓘ |
| hasServiceDesignation |
Broadway Local
ⓘ
Fourth Avenue Local ⓘ |
| historicalPredecessor |
BMT 2 (Fourth Avenue Local)
ⓘ
BMT Division ⓘ
surface form:
BMT RR service
|
| lateNightService | Brooklyn-only shuttle pattern (historically, subject to change) ⓘ |
| lineUsed |
BMT Broadway Line
ⓘ
BMT Fourth Avenue Line ⓘ |
| modeOfTransport | subway ⓘ |
| operator |
Metropolitan Transportation Authority
ⓘ
surface form:
New York City Transit Authority
|
| owner | Metropolitan Transportation Authority ⓘ |
| primaryBrooklynTrunkLine | Fourth Avenue Line local tracks ⓘ |
| primaryManhattanTrunkLine |
BMT Broadway Line
ⓘ
surface form:
Broadway Line local tracks
|
| publicTransportType | urban rail ⓘ |
| region |
New York
ⓘ
surface form:
New York State
|
| rollingStock |
R160 subway cars
ⓘ
surface form:
R160 subway car
R46 subway car ⓘ |
| safetySystem | wayside block signaling ⓘ |
| servesBoroughPair |
Manhattan–Brooklyn
ⓘ
Queens–Brooklyn ⓘ Queens ⓘ
surface form:
Queens–Manhattan
|
| serviceClass | lettered service ⓘ |
| serviceLetter | R ⓘ |
| serviceLetterColor | yellow ⓘ |
| serviceNature | local-only (no regular express segments) ⓘ |
| servicePattern | local ⓘ |
| serviceType | 24/7 service ⓘ |
| system | New York City Subway ⓘ |
| trackGauge | standard gauge (1,435 mm) ⓘ |
| usesBridge |
Manhattan Bridge
ⓘ
surface form:
Manhattan Bridge (historically, in some service patterns)
|
| usesTunnel | Montague Street Tunnel ⓘ |
| weekdayService | Queens–Brooklyn via Manhattan ⓘ |
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: R train Description of subject: The R train is a local service on the New York City Subway that runs through Queens, Manhattan, and Brooklyn along the Broadway and Fourth Avenue lines.
Referenced by (27)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Broadway Line (Manhattan)
subject surface form:
Montague Street Tunnel