USRA Light Mountain 4-8-2
E460575
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| USRA Light Mountain 4-8-2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4561519 — 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 Light Mountain 4-8-2 Context triple: [USRA standard steam locomotive designs, hasPart, USRA Light Mountain 4-8-2]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
WM Class I-2 2-10-0
WM Class I-2 2-10-0 was a powerful Decapod-type steam locomotive class used by the Western Maryland Railway primarily for heavy freight service over steep grades.
- 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 Light Mountain 4-8-2 Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
WM Class I-2 2-10-0
WM Class I-2 2-10-0 was a powerful Decapod-type steam locomotive class used by the Western Maryland Railway primarily for heavy freight service over steep grades.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
4-8-2 Mountain-type locomotive
ⓘ
USRA standard locomotive design ⓘ steam locomotive class ⓘ |
| category |
4-8-2 locomotives
ⓘ
Mountain-type steam locomotives ⓘ USRA standard steam locomotives ⓘ |
| configuration | two-wheel leading truck, eight driving wheels, two-wheel trailing truck ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| designedBy | United States Railroad Administration ⓘ |
| designedDuring | United States Railroad Administration control of U.S. railroads ⓘ |
| designedFor | multiple American railroads ⓘ |
| designStandard | USRA standard light 4-8-2 ⓘ |
| era | World War I era ⓘ |
| hasSubclass | railroad-specific subclasses and copies ⓘ |
| introducedAs | USRA Light Mountain ⓘ |
| powerType | steam ⓘ |
| primaryUse |
freight service
ⓘ
mixed-traffic service ⓘ passenger service ⓘ |
| standardizedBy | United States Railroad Administration ⓘ |
| usedFor |
heavy road service
ⓘ
mainline service ⓘ |
| usedIn |
United States
ⓘ
linked to:
United States of America
|
| wheelArrangement | 4-8-2 ⓘ |
| wheelArrangementName | Mountain ⓘ |
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 Light Mountain 4-8-2 Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.