New York City Subway
E474
The New York City Subway is one of the world’s largest and busiest rapid transit systems, serving the five boroughs of New York City with extensive 24/7 underground and elevated rail service.
All labels observed (49)
How this entity was disambiguated
This entity first appeared as the object of triple T2206 — 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: New York City Subway Context triple: [New York City, hasPublicTransitSystem, New York City Subway]
-
A.
Washington Metro
Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
-
B.
New York City
New York City is the largest city in the United States, a global center of finance, culture, media, and technology.
-
C.
Brooklyn Bridge
The Brooklyn Bridge is a historic 19th-century suspension bridge spanning the East River, renowned as an iconic symbol of New York City and a major connection between Manhattan and Brooklyn.
-
D.
Union Station
Union Station is a historic Beaux-Arts transportation hub and major intercity rail terminal in Washington, D.C., serving as a gateway to the U.S. capital.
-
E.
MBTA Fitchburg Line
The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
- 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: New York City Subway Target entity description: The New York City Subway is one of the world’s largest and busiest rapid transit systems, serving the five boroughs of New York City with extensive 24/7 underground and elevated rail service.
-
A.
Washington Metro
Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
-
B.
New York City
New York City is the largest city in the United States, a global center of finance, culture, media, and technology.
-
C.
Brooklyn Bridge
The Brooklyn Bridge is a historic 19th-century suspension bridge spanning the East River, renowned as an iconic symbol of New York City and a major connection between Manhattan and Brooklyn.
-
D.
Union Station
Union Station is a historic Beaux-Arts transportation hub and major intercity rail terminal in Washington, D.C., serving as a gateway to the U.S. capital.
-
E.
MBTA Fitchburg Line
The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
- F. None of above. chosen
Statements (60)
| Predicate | Object |
|---|---|
| instanceOf |
metro system
ⓘ
public transportation system ⓘ rapid transit system ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | 600 V DC third rail ⓘ |
| fareControl | turnstiles ⓘ |
| fareSystem |
MetroCard
ⓘ
MetroCard ⓘ
surface form:
OMNY
|
| hasFeature |
elevated sections
ⓘ
express tracks ⓘ local tracks ⓘ underground sections ⓘ |
| hasLine |
1 train
ⓘ
2 train ⓘ 3 train ⓘ 4 train ⓘ 5 train ⓘ 6 train ⓘ 7 train ⓘ A train ⓘ B train ⓘ C train ⓘ D train ⓘ E train ⓘ F train ⓘ G train ⓘ J train ⓘ L train ⓘ M train ⓘ N train ⓘ Q train ⓘ R train ⓘ W train ⓘ J train ⓘ
surface form:
Z train
|
| hasPart |
New York City Subway
self-linksurface differs
ⓘ
surface form:
BMT Division
IND Division ⓘ IRT Division ⓘ |
| hasStation |
Penn Station (New York City)
ⓘ
surface form:
34th Street–Penn Station
Atlantic Avenue–Barclays Center station ⓘ Fulton Street station ⓘ Grand Central–42nd Street station ⓘ Times Square ⓘ
surface form:
Times Square–42nd Street station
|
| inception | 1904-10-27 ⓘ |
| locatedIn | New York City ⓘ |
| notableEvent | Hurricane Sandy service disruption 2012 ⓘ |
| openingDate | 1904-10-27 ⓘ |
| operator |
Metropolitan Transportation Authority
ⓘ
surface form:
MTA New York City Transit
Metropolitan Transportation Authority ⓘ |
| owner |
New York City
ⓘ
surface form:
City of New York
|
| primaryLanguage | English ⓘ |
| safetyFeature |
emergency intercoms on platforms
ⓘ
onboard emergency brake cords ⓘ |
| serves |
Brooklyn
ⓘ
Manhattan ⓘ Queens ⓘ Staten Island ⓘ The Bronx ⓘ |
| servicePattern | 24/7 service ⓘ |
| signageStandard | colored route bullets with letters and numbers ⓘ |
| trackGauge | 1,435 mm standard gauge ⓘ |
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: New York City Subway Description of subject: The New York City Subway is one of the world’s largest and busiest rapid transit systems, serving the five boroughs of New York City with extensive 24/7 underground and elevated rail service.
Referenced by (1,095)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Broadway Line (Manhattan)
subject surface form:
Astoria Line
this entity surface form:
New York City subway system
this entity surface form:
New York City elevated railway system
Astoria–Ditmars Boulevard (historical and/or alternate terminal)
→
fareZone
→
New York City Subway
ⓘ
subject surface form:
Astoria–Ditmars Boulevard
this entity surface form:
MTA New York City Subway
Astoria–Ditmars Boulevard (historical and/or alternate terminal)
→
category
→
New York City Subway
ⓘ
subject surface form:
Astoria–Ditmars Boulevard
this entity surface form:
New York City Subway terminals
subject surface form:
Montague Street Tunnel
subject surface form:
Atlantic Avenue (Brooklyn)
this entity surface form:
New York City Subway system
this entity surface form:
New York City Subway stations