Port Jefferson freight yard
E487405
Port Jefferson freight yard is a rail facility in Port Jefferson, New York, used primarily for the handling and storage of freight trains and cargo.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Port Jefferson freight yard canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5013836 — 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 freight yard Context triple: [Port Jefferson station, adjacentTo, Port Jefferson freight yard]
-
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.
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B.
Port Jefferson Branch
The Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from Hicksville to Port Jefferson, serving communities along the island’s North Shore.
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C.
Port Jervis station
Port Jervis station is a commuter rail station in Port Jervis, New York, serving as the western endpoint of Metro-North Railroad service to the region.
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D.
Copiague station
Copiague station is a Long Island Rail Road commuter rail stop located in Copiague, New York, serving passengers on the Babylon Branch.
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E.
Wassaic station
Wassaic station is the northern terminal of the Metro-North Railroad’s Harlem Line in Dutchess County, New York, serving as a commuter rail stop for the hamlet of Wassaic and surrounding areas.
- 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 freight yard Target entity description: Port Jefferson freight yard is a rail facility in Port Jefferson, New York, used primarily for the handling and storage of freight trains and cargo.
-
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.
Port Jefferson Branch
The Port Jefferson Branch is a Long Island Rail Road commuter rail line in New York that runs from Hicksville to Port Jefferson, serving communities along the island’s North Shore.
-
C.
Port Jervis station
Port Jervis station is a commuter rail station in Port Jervis, New York, serving as the western endpoint of Metro-North Railroad service to the region.
-
D.
Copiague station
Copiague station is a Long Island Rail Road commuter rail stop located in Copiague, New York, serving passengers on the Babylon Branch.
-
E.
Wassaic station
Wassaic station is the northern terminal of the Metro-North Railroad’s Harlem Line in Dutchess County, New York, serving as a commuter rail stop for the hamlet of Wassaic and surrounding areas.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
freight yard
ⓘ
rail transport facility ⓘ rail yard ⓘ |
| connectedTo |
Port Jefferson Branch main track
ⓘ
linked to:
Port Jefferson Branch (LIRR)
Port Jefferson station tracks ⓘ |
| country | United States of America ⓘ |
| electrification | none ⓘ |
| hasAccess | local roads in Port Jefferson ⓘ |
| hasFunction |
freight car storage
ⓘ
freight train assembly ⓘ local freight distribution ⓘ |
| locatedIn |
New York State
ⓘ
Port Jefferson, New York ⓘ Suffolk County, New York ⓘ |
| locatedNear |
Port Jefferson harbor
ⓘ
linked to:
Port Jefferson, New York
north shore of Long Island ⓘ |
| modeOfTransport | rail ⓘ |
| operator | Long Island Rail Road ⓘ |
| ownedBy | Long Island Rail Road ⓘ |
| partOf | Port Jefferson Branch ⓘ |
| primaryTraffic | freight ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed |
North Shore of Suffolk County
ⓘ
linked to:
North Shore of Long Island
|
| serves |
Port Jefferson harbor area
ⓘ
Port Jefferson station ⓘ |
| usedFor |
handling cargo
ⓘ
handling freight trains ⓘ storage of cargo ⓘ storage of freight trains ⓘ |
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 freight yard Description of subject: Port Jefferson freight yard is a rail facility in Port Jefferson, New York, used primarily for the handling and storage of freight trains and cargo.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.