A train
E49361
The A train is a New York City Subway service that runs along the Eighth Avenue Line, connecting northern Manhattan and Queens with Brooklyn.
All labels observed (1)
| Label | Occurrences |
|---|---|
| A train canonical | 25 |
How this entity was disambiguated
This entity first appeared as the object of triple T386464 — 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: A train Context triple: [Chelsea, Manhattan, servedBy, A train]
-
A.
1 train
The 1 train is a New York City Subway service that runs along the Broadway–Seventh Avenue Line, providing local service between the Bronx and lower Manhattan.
-
B.
2 train
The 2 train is a New York City Subway service that runs as a numbered, typically express route on the IRT lines, connecting the Bronx, Manhattan, and Brooklyn.
-
C.
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.
-
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.
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.
- 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: A train Target entity description: The A train is a New York City Subway service that runs along the Eighth Avenue Line, connecting northern Manhattan and Queens with Brooklyn.
-
A.
1 train
The 1 train is a New York City Subway service that runs along the Broadway–Seventh Avenue Line, providing local service between the Bronx and lower Manhattan.
-
B.
2 train
The 2 train is a New York City Subway service that runs as a numbered, typically express route on the IRT lines, connecting the Bronx, Manhattan, and Brooklyn.
-
C.
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.
-
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.
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.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway service
ⓘ
rapid transit service ⓘ |
| accessibility | serves multiple ADA-accessible stations ⓘ |
| boroughServed |
Brooklyn
ⓘ
Manhattan ⓘ Queens ⓘ |
| city | New York City ⓘ |
| connectsArea |
Brooklyn
ⓘ
Queens ⓘ northern Manhattan ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| division | IND Division ⓘ |
| fareControl | proof-of-payment not used; turnstile entry ⓘ |
| fareMedium |
MetroCard
ⓘ
OMNY ⓘ |
| fareSystem | MTA fare system ⓘ |
| infrastructureType |
elevated (in outer borough segments)
ⓘ
underground ⓘ |
| lineColor | blue ⓘ |
| networkRole | primary north–south trunk on Eighth Avenue in Manhattan ⓘ |
| northernTerminal | Inwood–207th Street ⓘ |
| notableFeature |
one of the longest routes in the New York City Subway
ⓘ
provides service to the Rockaways ⓘ |
| operator |
Metropolitan Transportation Authority
ⓘ
New York City Transit Authority ⓘ |
| powerSupply | 750 V DC third rail ⓘ |
| rollingStockType | IND/B Division subway cars ⓘ |
| serviceFrequency | 24-hour service ⓘ |
| servicePattern |
express in Brooklyn
ⓘ
express in Manhattan ⓘ local in Queens ⓘ |
| serviceType |
express service
ⓘ
local service (in certain segments and times) ⓘ |
| southernTerminal |
Far Rockaway–Mott Avenue
ⓘ
Ozone Park–Lefferts Boulevard ⓘ Rockaway Park–Beach 116th Street (shuttle or limited through service) ⓘ
linked to:
Rockaway Park–Beach 116th Street
|
| state | New York ⓘ |
| symbolLetter | A ⓘ |
| system | New York City Subway ⓘ |
| trackGauge | standard gauge ⓘ |
| trunkLineInManhattan |
IND Eighth Avenue Line
ⓘ
linked to:
Eighth Avenue Line
|
| usesLine |
IND Concourse Line (rush hours, limited)
ⓘ
linked to:
IND Concourse Line
IND Eighth Avenue Line ⓘ
linked to:
Eighth Avenue Line
IND Fulton Street Line ⓘ
linked to:
IND Fulton Street Line (subway portion)
IND Rockaway Line ⓘ
linked to:
IND Rockaway Line (subway portion)
|
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: A train Description of subject: The A train is a New York City Subway service that runs along the Eighth Avenue Line, connecting northern Manhattan and Queens with Brooklyn.
Referenced by (25)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Eighth Avenue Line in Manhattan
subject linked to:
163rd Street–Amsterdam Avenue (IND Eighth Avenue Line)
subject linked to:
163rd Street–Amsterdam Avenue (IND Eighth Avenue Line)