SP 4440
E1437052
UNEXPLORED
SP 4440 is a Southern Pacific GS-4 class streamlined steam locomotive that served in passenger service in the mid-20th century.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SP 4440 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T20530825 — 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: SP 4440 Context triple: [Southern Pacific GS-4, fleetNumbers, SP 4440]
-
A.
SP 4450
SP 4450 is a specific Southern Pacific GS-4 class streamlined steam locomotive that operated in passenger service for the Southern Pacific Railroad.
-
B.
SP 4439
SP 4439 is a specific Southern Pacific GS-4 class streamlined steam locomotive that once hauled high-speed passenger trains in the western United States.
-
C.
SP 4250
SP 4250 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s famous cab-forward fleet used primarily for heavy freight service.
-
D.
SP 4245
SP 4245 is a Southern Pacific Railroad EMD AC-11 class articulated steam locomotive, part of a series of powerful cab-forward engines used primarily for heavy freight service over mountainous routes.
-
E.
SP 4274
SP 4274 is a Southern Pacific Railroad locomotive, specifically an EMD AC-11 class cab-forward steam engine used for heavy freight service.
- 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: SP 4440 Target entity description: SP 4440 is a Southern Pacific GS-4 class streamlined steam locomotive that served in passenger service in the mid-20th century.
-
A.
SP 4450
SP 4450 is a specific Southern Pacific GS-4 class streamlined steam locomotive that operated in passenger service for the Southern Pacific Railroad.
-
B.
SP 4439
SP 4439 is a specific Southern Pacific GS-4 class streamlined steam locomotive that once hauled high-speed passenger trains in the western United States.
-
C.
SP 4250
SP 4250 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s famous cab-forward fleet used primarily for heavy freight service.
-
D.
SP 4245
SP 4245 is a Southern Pacific Railroad EMD AC-11 class articulated steam locomotive, part of a series of powerful cab-forward engines used primarily for heavy freight service over mountainous routes.
-
E.
SP 4274
SP 4274 is a Southern Pacific Railroad locomotive, specifically an EMD AC-11 class cab-forward steam engine used for heavy freight service.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.