USRA Heavy Mountain 4-8-2
E464992
The USRA Heavy Mountain 4-8-2 was a standardized World War I–era American steam locomotive design built for heavy passenger and fast freight service, featuring a 4-8-2 wheel arrangement and robust construction for demanding mainline duties.
All labels observed (1)
| Label | Occurrences |
|---|---|
| USRA Heavy Mountain 4-8-2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4561520 — 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: USRA Heavy Mountain 4-8-2 Context triple: [USRA standard steam locomotive designs, hasPart, USRA Heavy Mountain 4-8-2]
-
A.
USRA Light Mountain 4-8-2
The USRA Light Mountain 4-8-2 was a standardized World War I–era American steam locomotive design used by multiple railroads for mixed-traffic service under the United States Railroad Administration.
-
B.
USRA Heavy Mikado 2-8-2
The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
-
C.
USRA Heavy Pacific 4-6-2
The USRA Heavy Pacific 4-6-2 was a standardized heavy passenger steam locomotive design used by multiple American railroads during the United States Railroad Administration era in World War I.
-
D.
USRA Light Mikado 2-8-2
The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
-
E.
USRA Light Pacific 4-6-2
The USRA Light Pacific 4-6-2 was a widely used American passenger steam locomotive type developed under the United States Railroad Administration during World War I, known for its balanced performance and standardized design.
- 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: USRA Heavy Mountain 4-8-2 Target entity description: The USRA Heavy Mountain 4-8-2 was a standardized World War I–era American steam locomotive design built for heavy passenger and fast freight service, featuring a 4-8-2 wheel arrangement and robust construction for demanding mainline duties.
-
A.
USRA Light Mountain 4-8-2
The USRA Light Mountain 4-8-2 was a standardized World War I–era American steam locomotive design used by multiple railroads for mixed-traffic service under the United States Railroad Administration.
-
B.
USRA Heavy Mikado 2-8-2
The USRA Heavy Mikado 2-8-2 was a standardized World War I–era American steam freight locomotive design known for its robust construction, high tractive effort, and widespread use across multiple railroads.
-
C.
USRA Heavy Pacific 4-6-2
The USRA Heavy Pacific 4-6-2 was a standardized heavy passenger steam locomotive design used by multiple American railroads during the United States Railroad Administration era in World War I.
-
D.
USRA Light Mikado 2-8-2
The USRA Light Mikado 2-8-2 was a widely used World War I–era American freight steam locomotive type designed for balanced performance and standardized construction across multiple railroads.
-
E.
USRA Light Pacific 4-6-2
The USRA Light Pacific 4-6-2 was a widely used American passenger steam locomotive type developed under the United States Railroad Administration during World War I, known for its balanced performance and standardized design.
- F. None of above. chosen
Statements (36)
| Predicate | Object |
|---|---|
| instanceOf |
4-8-2 Mountain-type locomotive
ⓘ
USRA standard locomotive design ⓘ steam locomotive class ⓘ |
| belongsToCategory |
Mountain-type steam locomotives
ⓘ
USRA standard locomotives NERFINISHED ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designedDuring | United States federal control of railroads ⓘ |
| designedFor |
fast freight service
ⓘ
heavy passenger service ⓘ heavy train loads ⓘ high-speed operation ⓘ mainline service ⓘ |
| designer | United States Railroad Administration NERFINISHED ⓘ |
| designStandard | USRA Heavy Mountain NERFINISHED ⓘ |
| era | World War I era NERFINISHED ⓘ |
| gauge | standard gauge ⓘ |
| hasConfiguration |
four driving axles
ⓘ
leading truck ⓘ trailing truck ⓘ |
| hasFeature |
eight driving wheels
ⓘ
large firebox ⓘ robust construction ⓘ two-wheel leading truck ⓘ two-wheel trailing truck ⓘ |
| hasRole |
dual-service locomotive
ⓘ
heavy road locomotive ⓘ |
| introducedBy | United States Railroad Administration NERFINISHED ⓘ |
| introducedInDecade | 1910s ⓘ |
| operatedOn | mainline routes ⓘ |
| powerType | steam ⓘ |
| regulator | United States Railroad Administration NERFINISHED ⓘ |
| UICClassification | 2D1 ⓘ |
| usedFor |
fast freight trains
ⓘ
intercity passenger trains ⓘ |
| usedIn | United States railroads NERFINISHED ⓘ |
| wheelArrangement | 4-8-2 ⓘ |
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: USRA Heavy Mountain 4-8-2 Description of subject: The USRA Heavy Mountain 4-8-2 was a standardized World War I–era American steam locomotive design built for heavy passenger and fast freight service, featuring a 4-8-2 wheel arrangement and robust construction for demanding mainline duties.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.