GP40MC
E419692
The GP40MC is a rebuilt diesel-electric locomotive model used primarily for commuter rail service, notably by the Massachusetts Bay Transportation Authority (MBTA).
All labels observed (1)
| Label | Occurrences |
|---|---|
| GP40MC canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4178937 — 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: GP40MC Context triple: [MBTA diesel locomotives, hasModel, GP40MC]
-
A.
GP40PH-2
The GP40PH-2 is a rebuilt passenger diesel-electric locomotive, derived from the EMD GP40 freight design and equipped with head-end power for commuter rail service.
-
B.
G6 GT
The G6 GT is a sport-oriented trim of the Pontiac G6 midsize car, offering upgraded performance and features over the base model.
-
C.
Mark VII Limited
Mark VII Limited was a television and film production company founded by Jack Webb, best known for producing the police procedural series Dragnet.
-
D.
Grand Prix GXP
The Grand Prix GXP is a high-performance, V8-powered sport sedan variant of the Pontiac Grand Prix, featuring upgraded handling, styling, and equipment.
-
E.
GA 400
GA 400 is a major north–south freeway in Georgia that connects downtown Atlanta with its northern suburbs and exurbs.
- 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: GP40MC Target entity description: The GP40MC is a rebuilt diesel-electric locomotive model used primarily for commuter rail service, notably by the Massachusetts Bay Transportation Authority (MBTA).
-
A.
GP40PH-2
The GP40PH-2 is a rebuilt passenger diesel-electric locomotive, derived from the EMD GP40 freight design and equipped with head-end power for commuter rail service.
-
B.
G6 GT
The G6 GT is a sport-oriented trim of the Pontiac G6 midsize car, offering upgraded performance and features over the base model.
-
C.
Mark VII Limited
Mark VII Limited was a television and film production company founded by Jack Webb, best known for producing the police procedural series Dragnet.
-
D.
Grand Prix GXP
The Grand Prix GXP is a high-performance, V8-powered sport sedan variant of the Pontiac Grand Prix, featuring upgraded handling, styling, and equipment.
-
E.
GA 400
GA 400 is a major north–south freeway in Georgia that connects downtown Atlanta with its northern suburbs and exurbs.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
diesel-electric locomotive
ⓘ
rebuilt locomotive ⓘ |
| brakingSystem |
air brakes
ⓘ
dynamic brakes ⓘ |
| builderOfOriginalUnits |
EMD
ⓘ
Electro-Motive Division ⓘ |
| category |
MBTA diesel locomotives
ⓘ
surface form:
MBTA locomotives
locomotives of the United States ⓘ |
| countryOfOperation |
United States of America
ⓘ
surface form:
United States
|
| designedFor | push-pull operation with cab cars ⓘ |
| fuelType | diesel fuel ⓘ |
| gauge | standard gauge ⓘ |
| hasCabConfiguration | road-switcher hood unit ⓘ |
| hasCoupling | AAR knuckle coupler ⓘ |
| hasFeature |
head-end power
ⓘ
microprocessor controls ⓘ passenger-compatible gearing ⓘ revised cab layout ⓘ |
| hasHeadEndPower | yes ⓘ |
| hasOperatorColorScheme | MBTA purple and silver livery ⓘ |
| hasPrimeMover | EMD 645-series diesel engine ⓘ |
| hasSafetySystem |
automatic train control (on equipped lines)
ⓘ
cab signals (on equipped lines) ⓘ |
| introducedForService | 1990s ⓘ |
| operatesOn | non-electrified commuter rail lines ⓘ |
| operator |
MBTA Commuter Rail network
ⓘ
surface form:
MBTA Commuter Rail
MBTA ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| powerOutputClass | 3000–3500 hp range ⓘ |
| powerType | diesel-electric ⓘ |
| primaryRegionOfOperation | Massachusetts ⓘ |
| primaryUse | commuter rail service ⓘ |
| railwaySystem | MBTA Commuter Rail network NERFINISHED ⓘ |
| rebuildContractor |
MK Rail
ⓘ
Morrison-Knudsen ⓘ |
| rebuildType | passenger service conversion ⓘ |
| rebuiltFrom |
EMD GP40
NERFINISHED
ⓘ
EMD GP40-2 NERFINISHED ⓘ |
| serviceRole |
push-pull commuter locomotive
ⓘ
road switcher for passenger trains ⓘ |
| serviceType | diesel-hauled commuter rail ⓘ |
| trackGauge | 1435 mm ⓘ |
| usedBy | MBTA contractors such as Keolis Commuter Services ⓘ |
| usedIn |
Greater Boston
ⓘ
surface form:
Boston metropolitan area
|
| usedOn | MBTA commuter rail lines NERFINISHED ⓘ |
| usedWith |
MBTA Commuter Rail coaches
ⓘ
surface form:
MBTA bilevel coaches
MBTA Commuter Rail coaches ⓘ
surface form:
MBTA single-level commuter coaches
|
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: GP40MC Description of subject: The GP40MC is a rebuilt diesel-electric locomotive model used primarily for commuter rail service, notably by the Massachusetts Bay Transportation Authority (MBTA).
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.