Interborough Rapid Transit legacy lines
E589239
The Interborough Rapid Transit legacy lines are the original New York City Subway routes built and operated by the IRT company in the early 20th century, now forming the A Division of the modern subway system.
All labels observed (3)
| Label | Occurrences |
|---|---|
| A Division (IRT) of the New York City Subway | 1 |
| Interborough Rapid Transit Company lines | 1 |
| Interborough Rapid Transit legacy lines canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6356501 — 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: Interborough Rapid Transit legacy lines Context triple: [Lexington Avenue Express (5), partOfNetwork, Interborough Rapid Transit legacy lines]
-
A.
Brooklyn IRT lines
The Brooklyn IRT lines are a group of New York City Subway routes in Brooklyn that were originally built and operated by the Interborough Rapid Transit Company as part of its early rapid transit network.
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B.
Bronx elevated lines
The Bronx elevated lines were early New York City rapid transit routes consisting of elevated railway tracks extending service from Manhattan into the Bronx.
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C.
Brooklyn–Manhattan Transit Corporation subway network
The Brooklyn–Manhattan Transit Corporation subway network was a major early 20th-century rapid transit system in New York City that operated extensive lines in Brooklyn and Manhattan before being incorporated into today’s NYC Subway.
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D.
BMT Broadway Line
The BMT Broadway Line is a major New York City Subway trunk line in Manhattan, carrying N, Q, R, and W trains through Midtown and Lower Manhattan via Broadway.
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E.
New York City Subway M line
The New York City Subway M line is a rapid transit service that runs primarily in Manhattan, Brooklyn, and Queens, connecting neighborhoods such as Middle Village and Forest Hills with Midtown Manhattan via the Sixth Avenue Line.
- 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: Interborough Rapid Transit legacy lines Target entity description: The Interborough Rapid Transit legacy lines are the original New York City Subway routes built and operated by the IRT company in the early 20th century, now forming the A Division of the modern subway system.
-
A.
Brooklyn IRT lines
The Brooklyn IRT lines are a group of New York City Subway routes in Brooklyn that were originally built and operated by the Interborough Rapid Transit Company as part of its early rapid transit network.
-
B.
Bronx elevated lines
The Bronx elevated lines were early New York City rapid transit routes consisting of elevated railway tracks extending service from Manhattan into the Bronx.
-
C.
Brooklyn–Manhattan Transit Corporation subway network
The Brooklyn–Manhattan Transit Corporation subway network was a major early 20th-century rapid transit system in New York City that operated extensive lines in Brooklyn and Manhattan before being incorporated into today’s NYC Subway.
-
D.
BMT Broadway Line
The BMT Broadway Line is a major New York City Subway trunk line in Manhattan, carrying N, Q, R, and W trains through Midtown and Lower Manhattan via Broadway.
-
E.
New York City Subway M line
The New York City Subway M line is a rapid transit service that runs primarily in Manhattan, Brooklyn, and Queens, connecting neighborhoods such as Middle Village and Forest Hills with Midtown Manhattan via the Sixth Avenue Line.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway division
ⓘ
public transport infrastructure ⓘ rapid transit lines ⓘ |
| alsoKnownAs |
A Division
NERFINISHED
ⓘ
IRT lines NERFINISHED ⓘ |
| beganOperation | 1904 ⓘ |
| electrification | third rail 600 V DC (nominal) ⓘ |
| fareSystem | integrated New York City Subway fare system ⓘ |
| formsDivision | A Division of the New York City Subway ⓘ |
| historicalEra | early 20th century urban transit expansion ⓘ |
| historicallyIncludesLine |
IRT Broadway–Seventh Avenue Line
NERFINISHED
ⓘ
IRT Dyre Avenue Line NERFINISHED ⓘ IRT Eastern Parkway Line NERFINISHED ⓘ IRT Flushing Line NERFINISHED ⓘ IRT Jerome Avenue Line NERFINISHED ⓘ IRT Lenox Avenue Line NERFINISHED ⓘ IRT Lexington Avenue Line NERFINISHED ⓘ IRT New Lots Line NERFINISHED ⓘ IRT Ninth Avenue Line (elevated) NERFINISHED ⓘ IRT Pelham Line NERFINISHED ⓘ IRT Second Avenue Line (elevated) NERFINISHED ⓘ IRT Sixth Avenue Line (elevated) NERFINISHED ⓘ IRT Third Avenue Line (elevated) NERFINISHED ⓘ IRT White Plains Road Line NERFINISHED ⓘ original IRT subway line ⓘ |
| historicalOperator | Interborough Rapid Transit Company NERFINISHED ⓘ |
| includesService |
1 train
ⓘ
2 train ⓘ 3 train ⓘ 4 train ⓘ 42nd Street Shuttle NERFINISHED ⓘ 5 train NERFINISHED ⓘ 6 train ⓘ 7 train NERFINISHED ⓘ S (42nd Street Shuttle) NERFINISHED ⓘ |
| integratedInto | unified New York City Subway system in 1940 ⓘ |
| locatedIn |
New York City
ⓘ
New York State NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| operatedBy |
Metropolitan Transportation Authority
ⓘ
New York City Transit Authority NERFINISHED ⓘ |
| originallyOperatedBy | Interborough Rapid Transit Company NERFINISHED ⓘ |
| ownership | City of New York NERFINISHED ⓘ |
| partOf | New York City Subway ⓘ |
| servesBorough |
Bronx
NERFINISHED
ⓘ
Brooklyn NERFINISHED ⓘ Manhattan NERFINISHED ⓘ Queens NERFINISHED ⓘ |
| successorOperator |
Metropolitan Transportation Authority
NERFINISHED
ⓘ
New York City Board of Transportation NERFINISHED ⓘ New York City Transit Authority NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRollingStock | A Division rolling stock ⓘ |
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: Interborough Rapid Transit legacy lines Description of subject: The Interborough Rapid Transit legacy lines are the original New York City Subway routes built and operated by the IRT company in the early 20th century, now forming the A Division of the modern subway system.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
145th Street station (Lenox Avenue Line)
→
isPartOfNetwork
→
Interborough Rapid Transit legacy lines
ⓘ
this entity surface form:
A Division (IRT) of the New York City Subway
this entity surface form:
Interborough Rapid Transit Company lines