Port Jefferson Branch (LIRR)
E946662
The Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from western Nassau County through central and northern Long Island to the village of Port Jefferson.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Port Jefferson Branch (LIRR) canonical | 1 |
| Port Jefferson Branch (electric zone) | 1 |
| Port Jefferson Branch (select trains via Main Line) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11697355 — 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: Port Jefferson Branch (LIRR) Context triple: [Floral Park station, line, Port Jefferson Branch (LIRR)]
-
A.
Port Jefferson station
Port Jefferson station is a Long Island Rail Road commuter rail station on Long Island, New York, serving as the primary rail hub for the Port Jefferson area.
-
B.
Jamaica Station (LIRR)
Jamaica Station (LIRR) is a major Long Island Rail Road hub in Queens, New York City, serving as a key transfer point for commuter rail, subway, and airport-bound passengers.
-
C.
Huntington station (LIRR)
Huntington station (LIRR) is a major Long Island Rail Road commuter rail station in Huntington, New York, serving as a key hub on the Port Jefferson Branch.
-
D.
Plandome station
Plandome station is a Long Island Rail Road commuter rail stop serving the village of Plandome on the Port Washington Branch in Nassau County, New York.
-
E.
Oyster Bay station
Oyster Bay station is a Long Island Rail Road commuter rail terminal located in the hamlet of Oyster Bay on Long Island, New York.
- 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: Port Jefferson Branch (LIRR) Target entity description: The Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from western Nassau County through central and northern Long Island to the village of Port Jefferson.
-
A.
Port Jefferson station
Port Jefferson station is a Long Island Rail Road commuter rail station on Long Island, New York, serving as the primary rail hub for the Port Jefferson area.
-
B.
Jamaica Station (LIRR)
Jamaica Station (LIRR) is a major Long Island Rail Road hub in Queens, New York City, serving as a key transfer point for commuter rail, subway, and airport-bound passengers.
-
C.
Huntington station (LIRR)
Huntington station (LIRR) is a major Long Island Rail Road commuter rail station in Huntington, New York, serving as a key hub on the Port Jefferson Branch.
-
D.
Plandome station
Plandome station is a Long Island Rail Road commuter rail stop serving the village of Plandome on the Port Washington Branch in Nassau County, New York.
-
E.
Oyster Bay station
Oyster Bay station is a Long Island Rail Road commuter rail terminal located in the hamlet of Oyster Bay on Long Island, New York.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Long Island Rail Road branch
ⓘ
commuter rail line ⓘ |
| connectsWith | Main Line (LIRR) NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | third rail 750 V DC (Hicksville to Huntington) ⓘ |
| electrifiedSection | Hicksville to Huntington ⓘ |
| hasConnection |
Oyster Bay Branch (via Main Line)
NERFINISHED
ⓘ
Ronkonkoma Branch (via Main Line) NERFINISHED ⓘ |
| hasNonElectrifiedSection | Huntington to Port Jefferson GENERATED ⓘ |
| hasStation |
Cold Spring Harbor
NERFINISHED
ⓘ
Greenlawn NERFINISHED ⓘ Hicksville NERFINISHED ⓘ Huntington NERFINISHED ⓘ Kings Park NERFINISHED ⓘ Northport NERFINISHED ⓘ Port Jefferson NERFINISHED ⓘ Smithtown NERFINISHED ⓘ St. James NERFINISHED ⓘ Stony Brook NERFINISHED ⓘ Syosset NERFINISHED ⓘ |
| historicalOperator | Long Island Rail Road NERFINISHED ⓘ |
| junction |
Hicksville
NERFINISHED
ⓘ
Queens Interlocking NERFINISHED ⓘ |
| lineNumber | Port Jefferson Branch NERFINISHED ⓘ |
| locatedIn |
Long Island
ⓘ
New York NERFINISHED ⓘ |
| network | MTA Long Island Rail Road NERFINISHED ⓘ |
| operator | Long Island Rail Road ⓘ |
| owner | Metropolitan Transportation Authority ⓘ |
| partOfNetwork | Long Island Rail Road NERFINISHED ⓘ |
| primaryUse | passenger service ⓘ |
| railGauge | standard gauge ⓘ |
| servesCity | Port Jefferson, New York NERFINISHED ⓘ |
| servesCounty |
Nassau County, New York
NERFINISHED
ⓘ
Suffolk County, New York NERFINISHED ⓘ |
| servesRegion |
central Long Island
ⓘ
north shore of Long Island ⓘ western Nassau County ⓘ |
| serviceType | commuter rail ⓘ |
| terminus |
Hicksville
NERFINISHED
ⓘ
Port Jefferson NERFINISHED ⓘ |
| trackConfiguration |
double track (Hicksville to Huntington)
ⓘ
single track (Huntington to Port Jefferson) ⓘ |
| usesRollingStock |
diesel locomotives
ⓘ
diesel multiple units ⓘ electric 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: Port Jefferson Branch (LIRR) Description of subject: The Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from western Nassau County through central and northern Long Island to the village of Port Jefferson.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Port Jefferson Branch (select trains via Main Line)
this entity surface form:
Port Jefferson Branch (electric zone)