East Side Access
E234821
East Side Access is a major New York City rail infrastructure project that brings Long Island Rail Road service into a new terminal beneath Grand Central Terminal in Manhattan.
All labels observed (4)
| Label | Occurrences |
|---|---|
| East Side Access project | 4 |
| East Side Access canonical | 3 |
| East Side Access at Grand Central Madison | 1 |
| East Side Access construction began in the 2000s | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2094518 — 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: East Side Access Context triple: [Grand Central Madison, projectName, East Side Access]
-
A.
MTA Bridges and Tunnels network
The MTA Bridges and Tunnels network is a system of major toll bridges and tunnels in New York City operated by the Metropolitan Transportation Authority, connecting the city’s boroughs and surrounding regions.
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B.
Port Authority Trans-Hudson
Port Authority Trans-Hudson (PATH) is a rapid transit rail system linking Manhattan with nearby cities in New Jersey within the New York metropolitan area.
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C.
Second Avenue Subway
The Second Avenue Subway is a New York City Subway line on Manhattan’s East Side, built to relieve congestion on the Lexington Avenue Line and long envisioned as a major north–south transit corridor.
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D.
Staten Island–Manhattan corridor
The Staten Island–Manhattan corridor is a key travel and commuting route linking Staten Island with Manhattan across New York Harbor.
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E.
Long Island Rail Road Port Washington Branch
The Long Island Rail Road Port Washington Branch is a commuter rail line in New York that runs from Manhattan to Port Washington, serving communities along the North Shore of Long Island.
- 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: East Side Access Target entity description: East Side Access is a major New York City rail infrastructure project that brings Long Island Rail Road service into a new terminal beneath Grand Central Terminal in Manhattan.
-
A.
MTA Bridges and Tunnels network
The MTA Bridges and Tunnels network is a system of major toll bridges and tunnels in New York City operated by the Metropolitan Transportation Authority, connecting the city’s boroughs and surrounding regions.
-
B.
Port Authority Trans-Hudson
Port Authority Trans-Hudson (PATH) is a rapid transit rail system linking Manhattan with nearby cities in New Jersey within the New York metropolitan area.
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C.
Second Avenue Subway
The Second Avenue Subway is a New York City Subway line on Manhattan’s East Side, built to relieve congestion on the Lexington Avenue Line and long envisioned as a major north–south transit corridor.
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D.
Staten Island–Manhattan corridor
The Staten Island–Manhattan corridor is a key travel and commuting route linking Staten Island with Manhattan across New York Harbor.
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E.
Long Island Rail Road Port Washington Branch
The Long Island Rail Road Port Washington Branch is a commuter rail line in New York that runs from Manhattan to Port Washington, serving communities along the North Shore of Long Island.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
public works project
ⓘ
rail infrastructure project ⓘ transportation project ⓘ |
| affects | Penn Station capacity allocation ⓘ |
| benefits |
direct LIRR access to East Midtown
ⓘ
increased LIRR peak-hour capacity into Manhattan ⓘ |
| boroughServed |
Manhattan
ⓘ
Queens ⓘ |
| cityServed | New York City ⓘ |
| connects |
Manhattan
ⓘ
Queens ⓘ |
| constructionBegan | 2000s ⓘ |
| country | United States of America ⓘ |
| creates | new LIRR terminal beneath Grand Central Terminal ⓘ |
| electrification | 750 V DC third rail ⓘ |
| formalPlanningPeriod | 1990s ⓘ |
| fundingSource |
Metropolitan Transportation Authority
ⓘ
State of New York ⓘ
linked to:
U.S. state of New York
federal government of the United States ⓘ
linked to:
United States government
|
| governingBody |
Metropolitan Transportation Authority Board
ⓘ
linked to:
Metropolitan Transportation Authority
|
| includes |
Grand Central Madison station
ⓘ
new rail yards and storage tracks ⓘ new tunnels in Manhattan ⓘ new tunnels in Queens ⓘ underground LIRR concourse at Grand Central ⓘ ventilation and service facilities ⓘ |
| locatedIn |
Manhattan
ⓘ
New York City ⓘ |
| opened | 2023 ⓘ |
| openedToPublic | January 2023 ⓘ |
| owner | Metropolitan Transportation Authority ⓘ |
| partOf | MTA Capital Program ⓘ |
| planningBegan | 1960s ⓘ |
| primaryRollingStock |
MTA LIRR M7
ⓘ
MTA LIRR M9 ⓘ |
| projectStatus | in operation ⓘ |
| purpose |
bring Long Island Rail Road service to Manhattan’s East Side
ⓘ
increase LIRR capacity into Manhattan ⓘ reduce travel times for Long Island commuters to East Midtown ⓘ |
| railGauge | standard gauge ⓘ |
| railNetwork |
Long Island Rail Road network
ⓘ
linked to:
Long Island Rail Road
|
| railOperator | Long Island Rail Road ⓘ |
| serves | Long Island Rail Road ⓘ |
| terminalName |
Grand Central Madison
ⓘ
linked to:
Grand Central Madison station
|
| terminusAt | Grand Central Terminal ⓘ |
| usesExistingInfrastructure | 63rd Street Tunnel lower level ⓘ |
| usesTunnelUnder |
East River
ⓘ
Queensboro Bridge area ⓘ
linked to:
Queens waterfront
|
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: East Side Access Description of subject: East Side Access is a major New York City rail infrastructure project that brings Long Island Rail Road service into a new terminal beneath Grand Central Terminal in Manhattan.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: East Side Access
subject linked to:
East River tunnels
linked to: East Side Access
linked to: East Side Access
linked to: East Side Access
linked to: East Side Access
Grand Central Madison station
→
constructionProjectStart
→
East Side Access construction began in the 2000s
ⓘ
linked to: East Side Access