SP 4439
E1435704
UNEXPLORED
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SP 4439 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T20530824 — 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 4439 Context triple: [Southern Pacific GS-4, fleetNumbers, SP 4439]
-
A.
SP 4249
SP 4249 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s famous cab-forward fleet used primarily in heavy freight service.
-
B.
SP 4247
SP 4247 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s well-known cab-forward fleet used primarily in heavy freight service.
-
C.
SP 4263
SP 4263 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s famous cab-forward fleet used primarily in heavy freight service.
-
D.
SP 4267
SP 4267 is a preserved Southern Pacific AC-11 class articulated steam locomotive, notable as one of the railroad’s powerful cab-forward engines used in heavy freight service.
-
E.
SP 4279
SP 4279 is a Southern Pacific Railroad EMD SD9 diesel-electric locomotive preserved and operated by the Niles Canyon Railway in California.
- 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 4439 Target entity description: 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.
-
A.
SP 4249
SP 4249 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s famous cab-forward fleet used primarily in heavy freight service.
-
B.
SP 4247
SP 4247 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s well-known cab-forward fleet used primarily in heavy freight service.
-
C.
SP 4263
SP 4263 is a Southern Pacific Railroad AC-11 class articulated steam locomotive, part of the railroad’s famous cab-forward fleet used primarily in heavy freight service.
-
D.
SP 4267
SP 4267 is a preserved Southern Pacific AC-11 class articulated steam locomotive, notable as one of the railroad’s powerful cab-forward engines used in heavy freight service.
-
E.
SP 4279
SP 4279 is a Southern Pacific Railroad EMD SD9 diesel-electric locomotive preserved and operated by the Niles Canyon Railway in California.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.