IRT (A Division) lines
E712285
IRT (A Division) lines are the narrower, original New York City Subway routes built to Interborough Rapid Transit specifications, requiring smaller-profile trains than those used on the B Division.
All labels observed (2)
| Label | Occurrences |
|---|---|
| IRT (A Division) lines canonical | 1 |
| IRT lines | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8142363 — 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 (A Division) lines Context triple: [B Division subway cars, cannotOperateOn, IRT (A Division) lines]
-
A.
IND lines
IND lines were a group of New York City Subway routes originally operated by the city-owned Independent Subway System, known for their extensive underground trunk lines and modern infrastructure compared to earlier private lines.
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B.
D Line
The D Line is a New York City Subway service that runs through multiple boroughs, including Brooklyn, providing rapid transit along a key north–south corridor.
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C.
D Line
The D Line is a heavy-rail subway route in the Los Angeles Metro system that runs primarily beneath Wilshire Boulevard, serving key neighborhoods between downtown Los Angeles and the city’s west side.
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D.
D Line
The D Line is a light rail service in the Denver metropolitan area that is part of the Regional Transportation District (RTD) transit system.
-
E.
K-lines
K-lines are a cognitive theory construct proposed by Marvin Minsky in "The Society of Mind," representing memory traces that, when activated, re-evoke networks of mental agents involved in past problem-solving.
- 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 (A Division) lines Target entity description: IRT (A Division) lines are the narrower, original New York City Subway routes built to Interborough Rapid Transit specifications, requiring smaller-profile trains than those used on the B Division.
-
A.
IND lines
IND lines were a group of New York City Subway routes originally operated by the city-owned Independent Subway System, known for their extensive underground trunk lines and modern infrastructure compared to earlier private lines.
-
B.
D Line
The D Line is a New York City Subway service that runs through multiple boroughs, including Brooklyn, providing rapid transit along a key north–south corridor.
-
C.
D Line
The D Line is a heavy-rail subway route in the Los Angeles Metro system that runs primarily beneath Wilshire Boulevard, serving key neighborhoods between downtown Los Angeles and the city’s west side.
-
D.
D Line
The D Line is a light rail service in the Denver metropolitan area that is part of the Regional Transportation District (RTD) transit system.
-
E.
K-lines
K-lines are a cognitive theory construct proposed by Marvin Minsky in "The Society of Mind," representing memory traces that, when activated, re-evoke networks of mental agents involved in past problem-solving.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
New York City Subway division
ⓘ
rapid transit line group ⓘ |
| alsoKnownAs |
A Division
NERFINISHED
ⓘ
IRT division ⓘ |
| builtToSpecificationOf | Interborough Rapid Transit Company NERFINISHED ⓘ |
| cannotShareTrainsWith | B Division lines ⓘ |
| fareControlledBy | Metropolitan Transportation Authority NERFINISHED ⓘ |
| hasAbbreviation | IRT NERFINISHED ⓘ |
| hasDivisionCode | A Division NERFINISHED ⓘ |
| hasElectrification | 600 V DC third rail ⓘ |
| hasInfrastructureType |
elevated
ⓘ
open-cut ⓘ underground ⓘ |
| hasLoadingGauge | smaller than B Division ⓘ |
| hasOriginalOperatorRole | first subway operator in New York City ⓘ |
| hasOriginalSegment | City Hall–145th Street line NERFINISHED ⓘ |
| hasOriginalTerminal | City Hall station NERFINISHED ⓘ |
| hasPlatformCompatibility | only with A Division rolling stock ⓘ |
| hasService |
1 train
ⓘ
2 train ⓘ 3 train ⓘ 4 train NERFINISHED ⓘ 42nd Street Shuttle NERFINISHED ⓘ 5 train NERFINISHED ⓘ 6 train ⓘ 7 train NERFINISHED ⓘ S (42nd Street Shuttle) NERFINISHED ⓘ |
| hasTrackGauge | standard gauge ⓘ |
| historicallyOperatedBy | Interborough Rapid Transit Company NERFINISHED ⓘ |
| integratedInto | unified New York City Subway system ⓘ |
| locatedIn | State of New York NERFINISHED ⓘ |
| opened | 1904 ⓘ |
| operatedBy |
Metropolitan Transportation Authority
ⓘ
New York City Transit Authority NERFINISHED ⓘ |
| partOf | New York City Subway ⓘ |
| servesBorough |
Bronx
NERFINISHED
ⓘ
Brooklyn NERFINISHED ⓘ Manhattan NERFINISHED ⓘ Queens NERFINISHED ⓘ |
| servesCity | New York City NERFINISHED ⓘ |
| usesCarLength |
51-foot cars
ⓘ
shorter cars than B Division ⓘ |
| usesCarWidth | narrower cars than B Division ⓘ |
| usesFareSystem |
MetroCard
NERFINISHED
ⓘ
OMNY contactless payment system NERFINISHED ⓘ |
| usesRollingStockProfile | narrower car profile ⓘ |
| usesRollingStockType | A Division rolling stock ⓘ |
| usesServiceDesignation | numbers and shuttle designations ⓘ |
| usesSignageColorScheme | numbered services ⓘ |
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 (A Division) lines Description of subject: IRT (A Division) lines are the narrower, original New York City Subway routes built to Interborough Rapid Transit specifications, requiring smaller-profile trains than those used on the B Division.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
IRT lines