IRT
E63229
IRT is a major division of the New York City Subway system that operates the numbered (1–7) train lines, originally built by the Interborough Rapid Transit Company.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IRT canonical | 263 |
How this entity was disambiguated
This entity first appeared as the object of triple T509368 — 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: IRT Context triple: [2 train, division, IRT]
-
A.
It
It is a 1986 horror novel by Stephen King about a shape-shifting entity that terrorizes children in the town of Derry, Maine.
-
B.
IRTF
The Internet Research Task Force (IRTF) is an organization that promotes long-term research related to the evolution and future of the Internet.
-
C.
IRU
IRU is the abbreviation for the International Romani Union, a global organization representing the interests and rights of Romani people.
-
D.
IS
IS is the two-letter ISO 3166-1 alpha-2 country code representing Iceland in international standards and systems.
-
E.
IM
IM is the two-letter ISO 3166-1 alpha-2 country code assigned to the Isle of Man.
- 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: IRT Target entity description: IRT is a major division of the New York City Subway system that operates the numbered (1–7) train lines, originally built by the Interborough Rapid Transit Company.
-
A.
It
It is a 1986 horror novel by Stephen King about a shape-shifting entity that terrorizes children in the town of Derry, Maine.
-
B.
IRTF
The Internet Research Task Force (IRTF) is an organization that promotes long-term research related to the evolution and future of the Internet.
-
C.
IRU
IRU is the abbreviation for the International Romani Union, a global organization representing the interests and rights of Romani people.
-
D.
IS
IS is the two-letter ISO 3166-1 alpha-2 country code representing Iceland in international standards and systems.
-
E.
IM
IM is the two-letter ISO 3166-1 alpha-2 country code assigned to the Isle of Man.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
division of the New York City Subway
ⓘ
rapid transit system division ⓘ |
| compatibleWith | only IRT-sized rolling stock ⓘ |
| distinguishedFrom |
BMT Division
ⓘ
surface form:
BMT division
IND division ⓘ |
| fareMedium |
MetroCard
ⓘ
OMNY ⓘ
surface form:
OMNY contactless payment system
|
| fareSystem | integrated New York City Subway fare system ⓘ |
| fullName |
Interborough Rapid Transit Company
ⓘ
surface form:
Interborough Rapid Transit Division
|
| gauge | standard gauge ⓘ |
| hasAbbreviation | IRT self-link ⓘ |
| hasColorCoding | route bullets with specific colors by trunk line ⓘ |
| hasInfrastructure |
elevated structures
ⓘ
surface right-of-way segments ⓘ tunnels ⓘ |
| hasRollingStockWidth | narrower than BMT/IND divisions ⓘ |
| hasServicePattern | local and express services ⓘ |
| historicalOperator | Interborough Rapid Transit Company ⓘ |
| historicalSystemType | privately operated subway company lines ⓘ |
| integratedInto | unified New York City Subway system ⓘ |
| locatedIn |
U.S. state of New York
ⓘ
surface form:
State of New York
United States of America ⓘ
surface form:
United States
|
| networkType | underground and elevated railway ⓘ |
| operatedBy | New York City Transit Authority ⓘ |
| operates |
New York City Subway
ⓘ
surface form:
New York City Subway numbered lines
|
| operatesLine |
1
ⓘ
2 ⓘ 3 ⓘ 4 ⓘ 5 ⓘ 6 ⓘ 7 ⓘ |
| originallyBuiltBy | Interborough Rapid Transit Company ⓘ |
| ownedBy |
New York City
ⓘ
surface form:
City of New York
|
| partOf | New York City Subway ⓘ |
| primaryFunction | urban passenger transportation ⓘ |
| safetySystem |
automatic train stop on many lines
ⓘ
wayside signals ⓘ |
| servesBorough |
Brooklyn
ⓘ
Manhattan ⓘ Queens ⓘ The Bronx ⓘ |
| servesCity | New York City ⓘ |
| trackConfiguration | multiple-track trunk lines with branches ⓘ |
| usesPowerSupply | third rail electric power ⓘ |
| usesSignage | numbered route designations ⓘ |
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: IRT Description of subject: IRT is a major division of the New York City Subway system that operates the numbered (1–7) train lines, originally built by the Interborough Rapid Transit Company.
Referenced by (263)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
86th Street (IRT Lexington Avenue Line)
subject surface form:
Brooklyn Bridge–City Hall station (4,5,6)
subject surface form:
116th Street–Columbia University