Ninth Avenue Line
E469851
The Ninth Avenue Line was New York City's first elevated railway, running along Manhattan's West Side and serving as a key component of the early rapid transit system before its eventual demolition.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ninth Avenue Line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4604315 — 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: Ninth Avenue Line Context triple: [Manhattan Railway elevated lines, mainLine, Ninth Avenue Line]
-
A.
Eighth Avenue Line
The Eighth Avenue Line is a major New York City Subway trunk line in Manhattan, primarily served by the A, C, and E trains and known as the system’s first fully independent subway route.
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B.
Sixth Avenue Line
The Sixth Avenue Line is a major New York City Subway trunk line in Manhattan that primarily carries B, D, F, and M trains along Sixth Avenue.
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C.
Fourth Avenue Line
The Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn that carries several services, including the N train, along a north–south corridor.
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D.
Second Avenue Line
The Second Avenue Line is a New York City Subway service planned and built to run primarily beneath Manhattan’s Second Avenue as part of a long-delayed effort to expand the city’s rapid transit network.
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E.
Third Avenue Line
The Third Avenue Line was a major elevated railway in Manhattan that once formed a key part of New York City's early rapid transit system.
- 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: Ninth Avenue Line Target entity description: The Ninth Avenue Line was New York City's first elevated railway, running along Manhattan's West Side and serving as a key component of the early rapid transit system before its eventual demolition.
-
A.
Eighth Avenue Line
The Eighth Avenue Line is a major New York City Subway trunk line in Manhattan, primarily served by the A, C, and E trains and known as the system’s first fully independent subway route.
-
B.
Sixth Avenue Line
The Sixth Avenue Line is a major New York City Subway trunk line in Manhattan that primarily carries B, D, F, and M trains along Sixth Avenue.
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C.
Fourth Avenue Line
The Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn that carries several services, including the N train, along a north–south corridor.
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D.
Second Avenue Line
The Second Avenue Line is a New York City Subway service planned and built to run primarily beneath Manhattan’s Second Avenue as part of a long-delayed effort to expand the city’s rapid transit network.
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E.
Third Avenue Line
The Third Avenue Line was a major elevated railway in Manhattan that once formed a key part of New York City's early rapid transit system.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
defunct railway line
ⓘ
elevated railway line ⓘ public transit line ⓘ |
| alsoKnownAs |
9th Avenue El
NERFINISHED
ⓘ
IRT Ninth Avenue Line NERFINISHED ⓘ |
| category |
Defunct New York City Subway lines
ⓘ
Railway lines closed in 1940 ⓘ Railway lines opened in 1868 ⓘ |
| constructionType | elevated viaduct ⓘ |
| convertedToSteamOperation | 1870s ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| demolished | 1940 ⓘ |
| electrified | early 20th century ⓘ |
| historicalEra |
19th century urban transit
ⓘ
early 20th century urban transit ⓘ |
| historicalStatus | demolished transit line ⓘ |
| infrastructureType | elevated steel structure ⓘ |
| locatedIn |
Manhattan
ⓘ
New York City ⓘ New York State NERFINISHED ⓘ |
| opened | 1868 ⓘ |
| openedAs | West Side and Yonkers Patent Railway NERFINISHED ⓘ |
| operatedOn | West Side of Manhattan NERFINISHED ⓘ |
| operator |
Interborough Rapid Transit Company
NERFINISHED
ⓘ
Manhattan Railway Company NERFINISHED ⓘ |
| partOf |
Manhattan elevated lines
NERFINISHED
ⓘ
New York City elevated railway system NERFINISHED ⓘ |
| precededBy | West Side and Yonkers Patent Railway NERFINISHED ⓘ |
| propulsionSystem |
electric multiple units
ⓘ
steam locomotives ⓘ |
| replacedBy |
IND Eighth Avenue Line
NERFINISHED
ⓘ
subway services on Manhattan’s West Side ⓘ |
| served | commuters on Manhattan’s West Side ⓘ |
| servedArea |
Lower Manhattan
NERFINISHED
ⓘ
Midtown Manhattan NERFINISHED ⓘ Upper Manhattan NERFINISHED ⓘ |
| serviceEnded | 1940 ⓘ |
| significance |
early component of New York City rapid transit system
ⓘ
first elevated railway in New York City ⓘ |
| terminus |
Harlem
NERFINISHED
ⓘ
South Ferry NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| transportMode | rail ⓘ |
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: Ninth Avenue Line Description of subject: The Ninth Avenue Line was New York City's first elevated railway, running along Manhattan's West Side and serving as a key component of the early rapid transit system before its eventual demolition.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.