LIRR Main Line trains
E1011147
LIRR Main Line trains are Long Island Rail Road commuter rail services that operate along the railroad’s primary corridor between New York City and central/eastern Long Island.
All labels observed (2)
| Label | Occurrences |
|---|---|
| LIRR Main Line trains canonical | 1 |
| Long Island Rail Road Main Line trains | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12937546 — 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 Main Line trains Context triple: [Floral Park–Hicksville segment of the Main Line, servedBy, LIRR Main Line trains]
-
A.
LIRR Atlantic Terminal service
LIRR Atlantic Terminal service is a Long Island Rail Road commuter rail service that operates between Atlantic Terminal in Brooklyn and points on the railroad’s network, providing a key transit link into downtown Brooklyn.
-
B.
LIRR Atlantic Branch
The LIRR Atlantic Branch is a key Long Island Rail Road line in New York City and Nassau County that provides commuter rail service between Atlantic Terminal in Brooklyn and eastern Queens/Long Island.
-
C.
MTA LIRR M9
The MTA LIRR M9 is a modern electric multiple-unit railcar fleet used by the Long Island Rail Road for high-capacity, commuter rail service.
-
D.
Long Island Rail Road
Long Island Rail Road is a major commuter rail system serving Long Island and parts of New York City, known as one of the busiest and oldest railroads in the United States.
-
E.
MTA LIRR M7
The MTA LIRR M7 is a fleet of electric multiple-unit commuter rail cars used by the Long Island Rail Road for high-frequency passenger service in the New York metropolitan area.
- 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 Main Line trains Target entity description: LIRR Main Line trains are Long Island Rail Road commuter rail services that operate along the railroad’s primary corridor between New York City and central/eastern Long Island.
-
A.
LIRR Atlantic Terminal service
LIRR Atlantic Terminal service is a Long Island Rail Road commuter rail service that operates between Atlantic Terminal in Brooklyn and points on the railroad’s network, providing a key transit link into downtown Brooklyn.
-
B.
LIRR Atlantic Branch
The LIRR Atlantic Branch is a key Long Island Rail Road line in New York City and Nassau County that provides commuter rail service between Atlantic Terminal in Brooklyn and eastern Queens/Long Island.
-
C.
MTA LIRR M9
The MTA LIRR M9 is a modern electric multiple-unit railcar fleet used by the Long Island Rail Road for high-capacity, commuter rail service.
-
D.
Long Island Rail Road
Long Island Rail Road is a major commuter rail system serving Long Island and parts of New York City, known as one of the busiest and oldest railroads in the United States.
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E.
MTA LIRR M7
The MTA LIRR M7 is a fleet of electric multiple-unit commuter rail cars used by the Long Island Rail Road for high-frequency passenger service in the New York metropolitan area.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail service
ⓘ
passenger rail service ⓘ |
| branchServices |
Hempstead Branch (via Main Line connection)
ⓘ
linked to:
Hempstead Branch of Long Island Rail Road
Oyster Bay Branch ⓘ Port Jefferson Branch ⓘ Port Washington Branch (via Main Line connection) ⓘ
linked to:
Port Washington Branch (select trains)
Ronkonkoma Branch ⓘ |
| connectsWith |
AirTrain JFK (via Jamaica)
ⓘ
linked to:
AirTrain JFK
MTA Regional Bus Operations ⓘ
linked to:
MTA New York City Bus
New York City Subway ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification | 750 V DC third rail (western segments) ⓘ |
| fareSystem | zonal distance-based fares ⓘ |
| gauge | standard gauge ⓘ |
| locomotiveType |
DE30AC diesel-electric locomotive
ⓘ
linked to:
DE30AC locomotive
DM30AC dual-mode locomotive ⓘ
linked to:
EMD DM30AC locomotives
|
| network | Long Island Rail Road Main Line ⓘ |
| operatedBy | Metropolitan Transportation Authority ⓘ |
| operator | Long Island Rail Road ⓘ |
| ownershipOfInfrastructure | Long Island Rail Road ⓘ |
| peakServicePattern | express and local trains between Manhattan terminals and Long Island suburbs ⓘ |
| primaryCorridorBetween |
New York City
ⓘ
central Long Island ⓘ
linked to:
Central Long Island
eastern Long Island ⓘ |
| primaryFunction | commuter access between Long Island and Manhattan ⓘ |
| rollingStock |
C3 bilevel coach
ⓘ
M7 electric multiple unit ⓘ M9 electric multiple unit ⓘ |
| safetySystem |
Positive Train Control (PTC)
ⓘ
linked to:
Positive Train Control
|
| servesRegion |
Long Island
ⓘ
New York City ⓘ |
| servesStation |
Hicksville
ⓘ
linked to:
Hicksville, New York
Huntington ⓘ Jamaica ⓘ Mineola ⓘ
linked to:
Mineola, New York
Oyster Bay ⓘ Port Jefferson ⓘ
linked to:
Port Jefferson, New York
Port Washington (via Main Line connection) ⓘ
linked to:
Port Washington Branch (select trains)
Ronkonkoma ⓘ |
| serviceType | commuter rail ⓘ |
| terminus |
Atlantic Terminal
ⓘ
Grand Central Madison ⓘ Long Island City ⓘ Penn Station ⓘ
linked to:
Penn Station (New York City)
|
| ticketing |
MTA eTix mobile ticketing
ⓘ
paper tickets ⓘ |
| timePeriod | operate seven days a week ⓘ |
| trackConfiguration | multiple-track main line with passing sidings and branches ⓘ |
| usesLine |
LIRR Main Line
ⓘ
linked to:
Long Island Rail Road Main Line
|
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 Main Line trains Description of subject: LIRR Main Line trains are Long Island Rail Road commuter rail services that operate along the railroad’s primary corridor between New York City and central/eastern Long Island.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: LIRR Main Line trains