IRT Sixth Avenue elevated
E191587
The IRT Sixth Avenue elevated was an early elevated railway line in Manhattan that once ran above Sixth Avenue before being demolished and replaced by the underground IND Sixth Avenue Line.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IRT Sixth Avenue elevated canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1695439 — 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 Sixth Avenue elevated Context triple: [IND Sixth Avenue Line, formerStructureReplaced, IRT Sixth Avenue elevated]
-
A.
Liberty Avenue elevated
Liberty Avenue elevated is a former elevated rapid transit line in Brooklyn and Queens that once carried BMT trains along Liberty Avenue before being partially incorporated into the IND Fulton Street and Rockaway Lines.
-
B.
Sixth Avenue express service
The Sixth Avenue express service is a New York City Subway route pattern that runs express along the IND Sixth Avenue Line in Manhattan, providing faster north–south service than the local trains on the same corridor.
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C.
IND Sixth Avenue Line
The IND Sixth Avenue Line is a major New York City Subway trunk line in Manhattan running primarily beneath Sixth Avenue and served by several B Division routes.
-
D.
Eighth Avenue Line in Manhattan
The Eighth Avenue Line in Manhattan is a major New York City Subway trunk line running under Eighth Avenue, carrying several IND services through Midtown and Upper Manhattan.
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E.
Main Line Elevated
Main Line Elevated was Boston’s original elevated rapid transit line that formed the core of what is now the MBTA Orange 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: IRT Sixth Avenue elevated Target entity description: The IRT Sixth Avenue elevated was an early elevated railway line in Manhattan that once ran above Sixth Avenue before being demolished and replaced by the underground IND Sixth Avenue Line.
-
A.
Liberty Avenue elevated
Liberty Avenue elevated is a former elevated rapid transit line in Brooklyn and Queens that once carried BMT trains along Liberty Avenue before being partially incorporated into the IND Fulton Street and Rockaway Lines.
-
B.
Sixth Avenue express service
The Sixth Avenue express service is a New York City Subway route pattern that runs express along the IND Sixth Avenue Line in Manhattan, providing faster north–south service than the local trains on the same corridor.
-
C.
IND Sixth Avenue Line
The IND Sixth Avenue Line is a major New York City Subway trunk line in Manhattan running primarily beneath Sixth Avenue and served by several B Division routes.
-
D.
Eighth Avenue Line in Manhattan
The Eighth Avenue Line in Manhattan is a major New York City Subway trunk line running under Eighth Avenue, carrying several IND services through Midtown and Upper Manhattan.
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E.
Main Line Elevated
Main Line Elevated was Boston’s original elevated rapid transit line that formed the core of what is now the MBTA Orange Line.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
defunct railway line
ⓘ
elevated railway line ⓘ |
| category |
Defunct New York City Subway lines
ⓘ
Interborough Rapid Transit legacy lines ⓘ
surface form:
Interborough Rapid Transit Company lines
Sixth Avenue ⓘ
surface form:
Sixth Avenue (Manhattan)
|
| country |
United States of America
ⓘ
surface form:
United States
|
| demolishedFor | construction of IND Sixth Avenue Line ⓘ |
| electrification | third rail ⓘ |
| hadRightOfWay | above street level ⓘ |
| historicalRole | early rapid transit line in Manhattan ⓘ |
| lineCharacter | urban elevated ⓘ |
| locatedIn |
New York City
ⓘ
New York ⓘ
surface form:
New York State
|
| location | Manhattan ⓘ |
| namedAfter | Sixth Avenue ⓘ |
| operator | Interborough Rapid Transit Company ⓘ |
| partOf |
IRT elevated network
ⓘ
Manhattan Railway elevated lines ⓘ
surface form:
New York City elevated railway system
|
| preceded | IND Sixth Avenue Line ⓘ |
| publicTransitMode | rail ⓘ |
| ranAbove | Sixth Avenue ⓘ |
| replacedBy | IND Sixth Avenue Line ⓘ |
| replacedInfrastructure | surface streetcar services along Sixth Avenue ⓘ |
| servedBorough | Manhattan ⓘ |
| servedCorridor |
Sixth Avenue corridor in Lower Manhattan
ⓘ
Sixth Avenue corridor ⓘ
surface form:
Sixth Avenue corridor in Midtown Manhattan
|
| servedFunction | commuter transport ⓘ |
| serviceType | rapid transit ⓘ |
| status | demolished ⓘ |
| structureType | steel elevated viaduct ⓘ |
| trackGauge | standard gauge ⓘ |
| transportSystem | New York City Subway precursor ⓘ |
| wasPartOf |
Manhattan Railway elevated lines
ⓘ
surface form:
Manhattan elevated lines
|
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 Sixth Avenue elevated Description of subject: The IRT Sixth Avenue elevated was an early elevated railway line in Manhattan that once ran above Sixth Avenue before being demolished and replaced by the underground IND Sixth Avenue Line.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.