AA train
E75107
The AA train was a former New York City Subway service designation that preceded and was eventually replaced by the modern C train.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AA train canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T572969 — 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: AA train Context triple: [C train, formerDesignation, AA 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.
J train
The J train is a New York City Subway service that runs along the BMT Jamaica Line, connecting Jamaica, Queens with Lower Manhattan via Brooklyn.
-
C.
G train
The G train is a New York City Subway service that runs entirely within Brooklyn and Queens, notably bypassing Manhattan.
-
D.
L train
The L train is a New York City Subway service that runs crosstown along 14th Street in Manhattan and through Williamsburg and Bushwick in Brooklyn, known for its heavy ridership and role as a key connector between the boroughs.
-
E.
N train
The N train is a New York City Subway service that runs on the BMT Broadway Line in Manhattan and into Brooklyn, providing both local and express transit.
- 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: AA train Target entity description: The AA train was a former New York City Subway service designation that preceded and was eventually replaced by the modern C 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.
J train
The J train is a New York City Subway service that runs along the BMT Jamaica Line, connecting Jamaica, Queens with Lower Manhattan via Brooklyn.
-
C.
G train
The G train is a New York City Subway service that runs entirely within Brooklyn and Queens, notably bypassing Manhattan.
-
D.
L train
The L train is a New York City Subway service that runs crosstown along 14th Street in Manhattan and through Williamsburg and Bushwick in Brooklyn, known for its heavy ridership and role as a key connector between the boroughs.
-
E.
N train
The N train is a New York City Subway service that runs on the BMT Broadway Line in Manhattan and into Brooklyn, providing both local and express transit.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway service
ⓘ
defunct transit service ⓘ |
| boroughServed |
Brooklyn
ⓘ
Manhattan ⓘ |
| city | New York City ⓘ |
| colorFamily | blue ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| division | IND Division ⓘ |
| fareSystem | New York City Transit fare system ⓘ |
| historicalEra | pre-1967 New York City Subway ⓘ |
| infrastructureOwner |
City of New York
ⓘ
linked to:
New York City
|
| letterDesignation | AA ⓘ |
| lineUsed |
IND Eighth Avenue Line
ⓘ
linked to:
Eighth Avenue Line
|
| operatedBy |
New York City Board of Transportation
ⓘ
New York City Transit Authority ⓘ |
| operatedOn |
IND Concourse Line (rush-hour variants)
ⓘ
linked to:
IND Concourse Line
|
| predecessorOf | C train ⓘ |
| primaryCorridor |
Eighth Avenue, Manhattan
ⓘ
linked to:
Eighth Avenue
|
| replacedBy | C train ⓘ |
| routeFamily |
A–C Eighth Avenue services
ⓘ
linked to:
Eighth Avenue Line
|
| serviceChangeReason | subway route lettering standardization ⓘ |
| serviceChangeType | designation renaming ⓘ |
| servicePattern | Eighth Avenue local ⓘ |
| serviceRenamedAs |
C train
ⓘ
CC train ⓘ |
| serviceRole | local complement to the A express ⓘ |
| serviceStatus | discontinued ⓘ |
| serviceType | local ⓘ |
| successorService |
C train
ⓘ
CC train ⓘ |
| system | New York City Subway ⓘ |
| terminalStation |
168th Street
ⓘ
Chambers Street ⓘ |
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: AA train Description of subject: The AA train was a former New York City Subway service designation that preceded and was eventually replaced by the modern C train.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.