MTA LIRR M9
E818581
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| MTA LIRR M1 | 1 |
| MTA LIRR M9 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9702895 — 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: MTA LIRR M9 Context triple: [East Side Access, primaryRollingStock, MTA LIRR M9]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
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.
- 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: MTA LIRR M9 Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
commuter railcar
ⓘ
electric multiple unit ⓘ |
| accessibilityFeature |
ADA-compliant boarding
ⓘ
accessible restrooms ⓘ wheelchair spaces ⓘ |
| brakeType | electro-pneumatic brakes ⓘ |
| carBodyMaterial | stainless steel ⓘ |
| country | United States of America ⓘ |
| couplingType | automatic coupler ⓘ |
| designedFor |
Long Island Rail Road electrified territory
ⓘ
linked to:
Long Island Rail Road diesel territory
high-capacity commuter service ⓘ |
| doorType | sliding pocket doors ⓘ |
| gauge | standard gauge ⓘ |
| hasFeature |
CCTV security cameras
ⓘ
LED destination signs ⓘ LED interior lighting ⓘ USB charging outlets ⓘ Wi‑Fi ready infrastructure ⓘ bicycle storage areas ⓘ improved crash energy management ⓘ onboard information displays ⓘ |
| introducedFor |
fleet modernization
ⓘ
replacement of aging M3 fleet ⓘ |
| locatedIn | New York State ⓘ |
| manufacturer |
Kawasaki Heavy Industries
ⓘ
Kawasaki Rail Car Inc. ⓘ
linked to:
Kawasaki Rail Car, Inc.
|
| multipleWorking |
compatible with other M9 units
ⓘ
not compatible with M7 in regular service ⓘ |
| operator | Long Island Rail Road ⓘ |
| owner | Metropolitan Transportation Authority ⓘ |
| powerSupply | 750 V DC third rail ⓘ |
| predecessor |
MTA LIRR M1
ⓘ
linked to:
MTA LIRR M9
MTA LIRR M3 ⓘ |
| railwayLineUsed |
Long Island Rail Road network
ⓘ
linked to:
Long Island Rail Road
|
| safetyFeature |
event recorder
ⓘ
onboard diagnostics ⓘ positive train control compatibility ⓘ |
| serviceType | commuter rail ⓘ |
| trackGauge | 1435 mm ⓘ |
| tractionType | electric ⓘ |
| usedOn |
Atlantic Branch
ⓘ
Babylon Branch ⓘ Far Rockaway Branch ⓘ Hempstead Branch ⓘ Long Beach Branch ⓘ Main Line to Grand Central Madison ⓘ Port Washington Branch ⓘ Ronkonkoma Branch ⓘ West Hempstead Branch ⓘ |
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: MTA LIRR M9 Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: MTA LIRR M9