D (New York City Subway service)
E434552
The D is a New York City Subway rapid transit service that runs primarily along the IND Sixth Avenue Line in Manhattan, connecting the Bronx and Brooklyn via express and local routes.
All labels observed (2)
| Label | Occurrences |
|---|---|
| D (New York City Subway service) canonical | 2 |
| D train (New York City Subway) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4285706 — 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: D (New York City Subway service) Context triple: [BMT Division, hasService, D (New York City Subway service)]
-
A.
S (New York City Subway service)
The S (New York City Subway service) is a designation used for the system’s shuttle trains, which provide short, point-to-point connections between specific stations.
-
B.
G (New York City Subway service)
The G is a New York City Subway service that runs entirely within Brooklyn and Queens, connecting neighborhoods without entering Manhattan.
-
C.
R (New York City Subway service)
The R (New York City Subway service) is a local rapid transit line in New York City that runs primarily along the BMT Broadway Line in Manhattan and the BMT Fourth Avenue Line in Brooklyn, connecting Queens, Manhattan, and Brooklyn.
-
D.
L (New York City Subway service)
The L is a New York City Subway rapid transit service that runs primarily along 14th Street in Manhattan and through Williamsburg and Bushwick in Brooklyn, known for its fully automated trains and heavy ridership.
-
E.
J (New York City Subway service)
The J is a New York City Subway service that runs along the BMT Jamaica Line, providing local and some peak-direction express service between Jamaica, Queens and Lower Manhattan.
- 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: D (New York City Subway service) Target entity description: The D is a New York City Subway rapid transit service that runs primarily along the IND Sixth Avenue Line in Manhattan, connecting the Bronx and Brooklyn via express and local routes.
-
A.
S (New York City Subway service)
The S (New York City Subway service) is a designation used for the system’s shuttle trains, which provide short, point-to-point connections between specific stations.
-
B.
G (New York City Subway service)
The G is a New York City Subway service that runs entirely within Brooklyn and Queens, connecting neighborhoods without entering Manhattan.
-
C.
R (New York City Subway service)
The R (New York City Subway service) is a local rapid transit line in New York City that runs primarily along the BMT Broadway Line in Manhattan and the BMT Fourth Avenue Line in Brooklyn, connecting Queens, Manhattan, and Brooklyn.
-
D.
L (New York City Subway service)
The L is a New York City Subway rapid transit service that runs primarily along 14th Street in Manhattan and through Williamsburg and Bushwick in Brooklyn, known for its fully automated trains and heavy ridership.
-
E.
J (New York City Subway service)
The J is a New York City Subway service that runs along the BMT Jamaica Line, providing local and some peak-direction express service between Jamaica, Queens and Lower Manhattan.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway service
ⓘ
rapid transit service ⓘ |
| accessibilityPolicy | ADA accessibility depends on individual stations ⓘ |
| boroughServed |
Bronx
NERFINISHED
ⓘ
Brooklyn ⓘ Manhattan ⓘ |
| colorOnMap | orange ⓘ |
| connectsBorough |
Bronx
NERFINISHED
ⓘ
Brooklyn NERFINISHED ⓘ Manhattan NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| division | B Division NERFINISHED ⓘ |
| electrification | 600 V DC third rail ⓘ |
| farePaymentMethod |
MetroCard
NERFINISHED
ⓘ
OMNY NERFINISHED ⓘ |
| fareSystem | Metropolitan Transportation Authority fare system NERFINISHED ⓘ |
| hasRouteDesignation | D NERFINISHED ⓘ |
| hasServiceClassification | lettered service ⓘ |
| letter | D NERFINISHED ⓘ |
| lineUsed |
BMT Fourth Avenue Line
NERFINISHED
ⓘ
BMT West End Line NERFINISHED ⓘ IND Concourse Line NERFINISHED ⓘ IND Culver Line NERFINISHED ⓘ IND Sixth Avenue Line NERFINISHED ⓘ |
| locale | New York City NERFINISHED ⓘ |
| mapSymbol | white D in an orange circle ⓘ |
| operator | New York City Transit Authority NERFINISHED ⓘ |
| owner | Metropolitan Transportation Authority ⓘ |
| partOfNetwork | IND Division legacy network NERFINISHED ⓘ |
| rollingStockType | B Division subway cars ⓘ |
| safetySystem |
automatic train stop
ⓘ
wayside signals ⓘ |
| serviceClass | IND Sixth Avenue express NERFINISHED ⓘ |
| serviceFamily | Sixth Avenue Line services NERFINISHED ⓘ |
| serviceFrequencyCharacteristic | more frequent during weekday rush hours ⓘ |
| serviceHistoryNote | has operated in various configurations since the mid-20th century ⓘ |
| servicePattern |
express in Manhattan
ⓘ
express in the Bronx ⓘ local in Brooklyn ⓘ |
| serviceType | 24-hour service ⓘ |
| system | New York City Subway ⓘ |
| ticketingSystem | proof-of-payment not used ⓘ |
| trackGauge | standard gauge ⓘ |
| trunkLineInManhattan | IND Sixth Avenue Line NERFINISHED ⓘ |
| usesRollingStockSeries |
R68
NERFINISHED
ⓘ
R68A NERFINISHED ⓘ |
| usesSignColorFamily | IND/BMT trunk line color scheme ⓘ |
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: D (New York City Subway service) Description of subject: The D is a New York City Subway rapid transit service that runs primarily along the IND Sixth Avenue Line in Manhattan, connecting the Bronx and Brooklyn via express and local routes.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
D train (New York City Subway)