B train
E14874
The B train is a New York City Subway service that runs on the IND Sixth Avenue Line, providing weekday express service in Manhattan and Brooklyn.
All labels observed (5)
| Label | Occurrences |
|---|---|
| B train canonical | 28 |
| B train (IND Sixth Avenue Express) on Concourse Line | 1 |
| B train (rush hours only) | 1 |
| B train (weekday only) | 1 |
| B train (weekdays only) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T23949 — 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: B train Context triple: [New York City Subway, hasLine, B train]
-
A.
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.
-
B.
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.
-
C.
MARC Train
MARC Train is a commuter rail service operating in Maryland and the surrounding region, connecting cities such as Washington, D.C., Baltimore, and Martinsburg.
-
D.
6 train
The 6 train is a local New York City Subway service running along the Lexington Avenue Line in Manhattan and into the Bronx.
-
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: B train Target entity description: The B train is a New York City Subway service that runs on the IND Sixth Avenue Line, providing weekday express service in Manhattan and Brooklyn.
-
A.
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.
-
B.
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.
-
C.
MARC Train
MARC Train is a commuter rail service operating in Maryland and the surrounding region, connecting cities such as Washington, D.C., Baltimore, and Martinsburg.
-
D.
6 train
The 6 train is a local New York City Subway service running along the Lexington Avenue Line in Manhattan and into the Bronx.
-
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 (48)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway service
ⓘ
rapid transit service ⓘ |
| accessibility | serves multiple ADA-accessible stations ⓘ |
| boroughServed |
Brooklyn
ⓘ
Manhattan ⓘ The Bronx ⓘ |
| city | New York City ⓘ |
| color | orange ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| division | IND Division ⓘ |
| electrification | 600 V DC third rail ⓘ |
| fareMedium |
MetroCard
ⓘ
OMNY ⓘ |
| fareSystem | Metropolitan Transportation Authority fare system ⓘ |
| gauge | standard gauge ⓘ |
| lineUsed | IND Sixth Avenue Line ⓘ |
| networkRole |
Brighton Line express service
ⓘ
Sixth Avenue express service ⓘ |
| operator |
Metropolitan Transportation Authority
ⓘ
surface form:
New York City Transit Authority
|
| parentOrganization | Metropolitan Transportation Authority ⓘ |
| poweredBy | electricity ⓘ |
| rollingStock |
R68 subway car
ⓘ
R68 subway car ⓘ
surface form:
R68A subway car
|
| serviceEndPoint | Brighton Beach ⓘ |
| serviceFamily | lettered services (IND/BMT) ⓘ |
| serviceFrequency | operates during daytime hours on weekdays ⓘ |
| serviceHours |
does not operate during late nights
ⓘ
does not operate on weekends ⓘ |
| serviceIntroduced | 20th century ⓘ |
| servicePattern |
express service on the BMT Brighton Line in Brooklyn
ⓘ
express service on the IND Sixth Avenue Line in Manhattan ⓘ local service in the Bronx ⓘ local service on the IND Concourse Line ⓘ no late night service ⓘ no weekend service ⓘ weekday-only service ⓘ |
| serviceStartPoint | Bedford Park Boulevard–Lehman College ⓘ |
| serviceType |
express service in Brooklyn
ⓘ
express service in Manhattan ⓘ |
| symbol | B ⓘ |
| system | New York City Subway ⓘ |
| terminalStationNorth | Bedford Park Boulevard–Lehman College ⓘ |
| terminalStationSouth | Brighton Beach ⓘ |
| trackConfiguration | uses underground, open-cut, and elevated sections ⓘ |
| trunkColorDesignation |
IND Sixth Avenue Line
ⓘ
surface form:
IND Sixth Avenue Line (orange)
|
| usesLine |
BMT Brighton Line
ⓘ
IND Concourse Line ⓘ IND Sixth Avenue Line ⓘ |
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: B train Description of subject: The B train is a New York City Subway service that runs on the IND Sixth Avenue Line, providing weekday express service in Manhattan and Brooklyn.
Referenced by (32)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
IND Sixth Avenue Line
this entity surface form:
B train (IND Sixth Avenue Express) on Concourse Line
this entity surface form:
B train (weekday only)
this entity surface form:
B train (weekdays only)
this entity surface form:
B train (rush hours only)