LIRR Greenport Branch
E618865
The LIRR Greenport Branch is a Long Island Rail Road line that runs along the North Fork of Long Island, providing rail service between eastern Suffolk County communities and the rest of the LIRR network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| LIRR Greenport Branch canonical | 1 |
| Long Island Rail Road Greenport Branch | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6659646 — 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: LIRR Greenport Branch Context triple: [Mattituck station, servedByLine, LIRR Greenport Branch]
-
A.
LIRR Port Jefferson Branch
The LIRR Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from Hicksville through northern Long Island to the village of Port Jefferson.
-
B.
LIRR Oyster Bay Branch
The LIRR Oyster Bay Branch is a Long Island Rail Road commuter rail line in New York that runs between Oyster Bay and Jamaica, serving communities on the North Shore of Long Island.
-
C.
LIRR Hempstead Branch
The LIRR Hempstead Branch is a Long Island Rail Road commuter rail line in New York that runs between Hempstead and major hubs in Queens and Manhattan.
-
D.
LIRR Montauk Branch
The LIRR Montauk Branch is a Long Island Rail Road line that runs from Jamaica in Queens through Long Island’s South Shore communities to Montauk at the island’s eastern tip.
-
E.
LIRR Babylon Branch
The LIRR Babylon Branch is a major electrified commuter rail line on the Long Island Rail Road that runs from Jamaica in Queens through Nassau County to Babylon in Suffolk County.
- 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: LIRR Greenport Branch Target entity description: The LIRR Greenport Branch is a Long Island Rail Road line that runs along the North Fork of Long Island, providing rail service between eastern Suffolk County communities and the rest of the LIRR network.
-
A.
LIRR Port Jefferson Branch
The LIRR Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from Hicksville through northern Long Island to the village of Port Jefferson.
-
B.
LIRR Oyster Bay Branch
The LIRR Oyster Bay Branch is a Long Island Rail Road commuter rail line in New York that runs between Oyster Bay and Jamaica, serving communities on the North Shore of Long Island.
-
C.
LIRR Hempstead Branch
The LIRR Hempstead Branch is a Long Island Rail Road commuter rail line in New York that runs between Hempstead and major hubs in Queens and Manhattan.
-
D.
LIRR Montauk Branch
The LIRR Montauk Branch is a Long Island Rail Road line that runs from Jamaica in Queens through Long Island’s South Shore communities to Montauk at the island’s eastern tip.
-
E.
LIRR Babylon Branch
The LIRR Babylon Branch is a major electrified commuter rail line on the Long Island Rail Road that runs from Jamaica in Queens through Nassau County to Babylon in Suffolk County.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | commuter rail line ⓘ |
| connectsTo | ferry services at Greenport (historically) ⓘ |
| connectsWith |
LIRR Main Line at Ronkonkoma
NERFINISHED
ⓘ
New York City via transfers on LIRR network ⓘ |
| country | United States of America ⓘ |
| electrification | not electrified east of Ronkonkoma ⓘ |
| fareSystem | LIRR zone-based fares ⓘ |
| hasBridge | Peconic River crossings (near Riverhead) NERFINISHED ⓘ |
| hasIntermediateTerminus | Riverhead (for some trains) ⓘ |
| hasMaintenanceFacility | Ronkonkoma yard (serving branch equipment) NERFINISHED ⓘ |
| hasSeasonalService | enhanced summer service to North Fork ⓘ |
| hasStation |
Greenport station
NERFINISHED
ⓘ
Mattituck station NERFINISHED ⓘ Medford station NERFINISHED ⓘ Riverhead station NERFINISHED ⓘ Ronkonkoma station NERFINISHED ⓘ Southold station NERFINISHED ⓘ Yaphank station NERFINISHED ⓘ |
| historicalRole | former main route to Greenport ferry connections ⓘ |
| infrastructureType | single-track line (mostly) ⓘ |
| isPartOfCorridor | LIRR diesel territory ⓘ |
| lineNumber | Main Line east of Ronkonkoma NERFINISHED ⓘ |
| locatedIn |
North Fork of Long Island
NERFINISHED
ⓘ
State of New York NERFINISHED ⓘ Suffolk County, New York ⓘ |
| mapColor | typically shown as an extension of the Main Line on LIRR maps ⓘ |
| namedAfter | Greenport, New York NERFINISHED ⓘ |
| openedForService | 19th century ⓘ |
| operator | Long Island Rail Road ⓘ |
| owner | Metropolitan Transportation Authority ⓘ |
| partOf | Long Island Rail Road network NERFINISHED ⓘ |
| primaryFunction | commuter and local passenger transport ⓘ |
| regionServed | Long Island NERFINISHED ⓘ |
| routeDirection | generally east–west ⓘ |
| safetySystem | wayside signals ⓘ |
| serves | eastern Suffolk County communities ⓘ |
| servicePattern | diesel shuttle service east of Ronkonkoma ⓘ |
| serviceType | passenger rail ⓘ |
| terminus |
Greenport
NERFINISHED
ⓘ
Ronkonkoma NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRollingStock |
diesel locomotives
ⓘ
diesel multiple units ⓘ |
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: LIRR Greenport Branch Description of subject: The LIRR Greenport Branch is a Long Island Rail Road line that runs along the North Fork of Long Island, providing rail service between eastern Suffolk County communities and the rest of the LIRR network.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Long Island Rail Road Greenport Branch