EMD DM30AC locomotives
E495258
EMD DM30AC locomotives are dual-mode diesel-electric locomotives built for the Long Island Rail Road, capable of operating in both diesel and third-rail electric modes to serve non-electrified and electrified territory.
All labels observed (3)
| Label | Occurrences |
|---|---|
| DM30AC dual-mode locomotive | 1 |
| DM30AC locomotive | 1 |
| EMD DM30AC locomotives canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5100696 — 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: EMD DM30AC locomotives Context triple: [LIRR C3 coach, compatibleWith, EMD DM30AC locomotives]
-
A.
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.
-
B.
EMC/EMD diesel locomotives
EMC/EMD diesel locomotives are a family of North American diesel-electric engines built by Electro-Motive Corporation/Division that played a major role in replacing steam power on many railroads.
-
C.
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.
-
D.
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.
-
E.
EMD F125
The EMD F125 is a modern diesel-electric passenger locomotive built by Electro-Motive Diesel for commuter rail service, featuring improved emissions performance, higher power output, and updated safety and control systems compared to its predecessors.
- 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: EMD DM30AC locomotives Target entity description: EMD DM30AC locomotives are dual-mode diesel-electric locomotives built for the Long Island Rail Road, capable of operating in both diesel and third-rail electric modes to serve non-electrified and electrified territory.
-
A.
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.
-
B.
EMC/EMD diesel locomotives
EMC/EMD diesel locomotives are a family of North American diesel-electric engines built by Electro-Motive Corporation/Division that played a major role in replacing steam power on many railroads.
-
C.
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.
-
D.
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.
-
E.
EMD F125
The EMD F125 is a modern diesel-electric passenger locomotive built by Electro-Motive Diesel for commuter rail service, featuring improved emissions performance, higher power output, and updated safety and control systems compared to its predecessors.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | dual-mode diesel-electric locomotive ⓘ |
| brakeType | air brakes ⓘ |
| category |
Electro-Motive Division locomotives
ⓘ
linked to:
EMC/EMD diesel locomotives
Long Island Rail Road locomotives ⓘ diesel-electric passenger locomotives ⓘ dual-mode locomotives ⓘ |
| controlType | multiple-unit capable ⓘ |
| countryOfOperation |
United States
ⓘ
linked to:
United States of America
|
| coupling | standard AAR knuckle coupler ⓘ |
| designedFor |
passenger service
ⓘ
push-pull operation ⓘ |
| designedToComplyWith | clearance restrictions in East River Tunnels ⓘ |
| electricSystem | 750 V DC third rail ⓘ |
| fuelType | diesel fuel ⓘ |
| gauge | standard gauge ⓘ |
| hasCabConfiguration | single cab ⓘ |
| introducedFor | Long Island Rail Road diesel territory access to Manhattan ⓘ |
| manufacturer | Electro-Motive Division ⓘ |
| notableFeature |
ability to operate in diesel mode away from third rail
ⓘ
ability to operate on third-rail electric power in tunnels and terminals ⓘ dual-mode capability ⓘ |
| operator |
Long Island Rail Road
ⓘ
Metropolitan Transportation Authority ⓘ |
| owner | Long Island Rail Road ⓘ |
| powerOutput |
3000 hp
ⓘ
approximately 2240 kW ⓘ |
| powerType |
diesel-electric
ⓘ
third-rail electric ⓘ |
| primaryRegionOfOperation | New York ⓘ |
| railroad | Long Island Rail Road ⓘ |
| railwayLineUsage |
LIRR Main Line
ⓘ
linked to:
Long Island Rail Road Main Line
LIRR Montauk Branch ⓘ other LIRR diesel branches ⓘ |
| routeUsage |
electrified territory
ⓘ
non-electrified territory ⓘ |
| safetySystem | cab signal compatible ⓘ |
| serviceRole | road passenger locomotive ⓘ |
| serviceType | commuter rail ⓘ |
| trackGauge | 1435 mm ⓘ |
| tractionCurrentCollection | contact shoe for third rail ⓘ |
| tractionType | AC traction ⓘ |
| trainHeating | head-end power ⓘ |
| UICClassification | Bo-Bo ⓘ |
| usedFor |
service between non-electrified branches and electrified main lines
ⓘ
service into New York Penn Station via East River Tunnels ⓘ |
| wheelArrangement | B-B ⓘ |
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: EMD DM30AC locomotives Description of subject: EMD DM30AC locomotives are dual-mode diesel-electric locomotives built for the Long Island Rail Road, capable of operating in both diesel and third-rail electric modes to serve non-electrified and electrified territory.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
LIRR C3 coaches
linked to: EMD DM30AC locomotives
linked to: EMD DM30AC locomotives