LIRR DM30AC diesel-electric locomotive
E495256
The LIRR DM30AC is a dual-mode diesel-electric locomotive used by the Long Island Rail Road to haul passenger trains between non-electrified territory and New York City terminals.
All labels observed (1)
| Label | Occurrences |
|---|---|
| LIRR DM30AC diesel-electric locomotive canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5100662 — 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 DM30AC diesel-electric locomotive Context triple: [Cannonball (LIRR train), usesLocomotive, LIRR DM30AC diesel-electric locomotive]
-
A.
LIRR C3 coaches
LIRR C3 coaches are bi-level passenger railcars used by the Long Island Rail Road to provide high-capacity commuter service, particularly on routes requiring diesel locomotives.
-
B.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail service.
-
C.
EMD F40PH
The EMD F40PH is a widely used four-axle diesel-electric passenger locomotive built by Electro-Motive Division, best known for its long service on North American commuter and intercity railroads.
-
D.
Amtrak Siemens Charger locomotives
Amtrak Siemens Charger locomotives are modern, diesel-electric passenger train engines used across various Amtrak routes for higher efficiency, lower emissions, and improved performance compared to older locomotive fleets.
-
E.
Amtrak General Electric Genesis locomotives
Amtrak General Electric Genesis locomotives are a series of diesel-electric passenger locomotives built by GE for Amtrak, widely used across its intercity routes in the United States.
- 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 DM30AC diesel-electric locomotive Target entity description: The LIRR DM30AC is a dual-mode diesel-electric locomotive used by the Long Island Rail Road to haul passenger trains between non-electrified territory and New York City terminals.
-
A.
LIRR C3 coaches
LIRR C3 coaches are bi-level passenger railcars used by the Long Island Rail Road to provide high-capacity commuter service, particularly on routes requiring diesel locomotives.
-
B.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail service.
-
C.
EMD F40PH
The EMD F40PH is a widely used four-axle diesel-electric passenger locomotive built by Electro-Motive Division, best known for its long service on North American commuter and intercity railroads.
-
D.
Amtrak Siemens Charger locomotives
Amtrak Siemens Charger locomotives are modern, diesel-electric passenger train engines used across various Amtrak routes for higher efficiency, lower emissions, and improved performance compared to older locomotive fleets.
-
E.
Amtrak General Electric Genesis locomotives
Amtrak General Electric Genesis locomotives are a series of diesel-electric passenger locomotives built by GE for Amtrak, widely used across its intercity routes in the United States.
- F. None of above. chosen
Statements (67)
| Predicate | Object |
|---|---|
| instanceOf | diesel-electric locomotive ⓘ |
| brakeType | air brakes ⓘ |
| buildDate |
1997
ⓘ
1998 ⓘ |
| builder |
EMD
ⓘ
Electro-Motive Division ⓘ |
| canOperateInTunnels | yes ⓘ |
| countryOfOperation |
United States
ⓘ
linked to:
United States of America
|
| cylinderCount | 12 ⓘ |
| designedFor | dual-mode operation between diesel territory and electrified terminals ⓘ |
| distinctionFromDE30AC | equipped for third-rail electric operation into Manhattan tunnels ⓘ |
| electrificationSystemCompatibility | 750 V DC third rail ⓘ |
| engineType | two-stroke diesel ⓘ |
| fleetNumbers |
500
ⓘ
501 ⓘ 502 ⓘ 503 ⓘ 504 ⓘ 505 ⓘ 506 ⓘ 507 ⓘ 508 ⓘ 509 ⓘ 510 ⓘ 511 ⓘ 512 ⓘ 513 ⓘ 514 ⓘ 515 ⓘ 516 ⓘ 517 ⓘ 518 ⓘ 519 ⓘ 520 ⓘ 521 ⓘ 522 ⓘ |
| gauge | standard gauge ⓘ |
| headEndPowerOutput |
480 V AC
ⓘ
600 kW ⓘ |
| introduced | late 1990s ⓘ |
| locale | Long Island ⓘ |
| maximumSpeed | 100 mph ⓘ |
| modelFamily | EMD GP40-based design ⓘ |
| multipleWorking | yes ⓘ |
| multipleWorkingType | EMD standard MU ⓘ |
| operator |
Long Island Rail Road
ⓘ
Metropolitan Transportation Authority via LIRR ⓘ |
| powerOutput | 3000 hp ⓘ |
| powerType | diesel-electric ⓘ |
| primaryUse | commuter passenger service ⓘ |
| primeMover |
EMD 12-710G3B
ⓘ
linked to:
EMD 12-710G3C-EC
|
| relatedModel | LIRR DE30AC ⓘ |
| routeUsage | non-electrified LIRR branches to New York City terminals ⓘ |
| safetySystem |
automatic train control
ⓘ
automatic train stop ⓘ cab signals ⓘ |
| thirdRailCollectionMethod | contact shoes ⓘ |
| totalProduced | 23 ⓘ |
| trackGauge | 1435 mm ⓘ |
| tractionMotors | AC traction motors ⓘ |
| trainHeating | head-end power ⓘ |
| transmission | AC traction ⓘ |
| tunnelOperationMode | electric only ⓘ |
| UICClassification | Bo′Bo′ ⓘ |
| usedAtTerminal |
Atlantic Terminal
ⓘ
Long Island City ⓘ Penn Station New York ⓘ
linked to:
Penn Station (New York City)
|
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 DM30AC diesel-electric locomotive Description of subject: The LIRR DM30AC is a dual-mode diesel-electric locomotive used by the Long Island Rail Road to haul passenger trains between non-electrified territory and New York City terminals.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Cannonball express train to the Hamptons