SP 4268
E668256
SP 4268 is a preserved Southern Pacific Railroad EMD E-unit diesel locomotive, often featured in heritage and excursion service.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SP 4268 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7429202 — 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 4268 Context triple: [AC-11, fleetNumbers, SP 4268]
-
A.
SP 4260
SP 4260 is a preserved Southern Pacific Railroad steam locomotive, notable as one of the surviving examples of the railroad’s AC-11 class articulated cab-forward engines.
-
B.
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.
-
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 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.
-
E.
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.
- 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 4268 Target entity description: SP 4268 is a preserved Southern Pacific Railroad EMD E-unit diesel locomotive, often featured in heritage and excursion service.
-
A.
SP 4260
SP 4260 is a preserved Southern Pacific Railroad steam locomotive, notable as one of the surviving examples of the railroad’s AC-11 class articulated cab-forward engines.
-
B.
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.
-
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 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.
-
E.
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.
- F. None of above. chosen
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf | diesel-electric locomotive ⓘ |
| builder | Electro-Motive Division ⓘ |
| category |
Electro-Motive Division locomotives
ⓘ
linked to:
EMC/EMD diesel locomotives
Southern Pacific Railroad locomotives ⓘ preserved diesel locomotives in the United States ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| gauge | standard gauge ⓘ |
| heritageRailUse |
excursion trains
ⓘ
special event trains ⓘ |
| heritageStatus | heritage locomotive ⓘ |
| locomotiveClass |
EMD E-series
ⓘ
linked to:
EMD E-unit
|
| locomotiveType | EMD E-unit ⓘ |
| manufacturer | Electro-Motive Division ⓘ |
| operator | Southern Pacific Railroad ⓘ |
| originalOwner | Southern Pacific Railroad ⓘ |
| powerType | diesel-electric ⓘ |
| preservation | heritage and excursion service ⓘ |
| preservationStatus | preserved ⓘ |
| railwayCompany | Southern Pacific Railroad ⓘ |
| railwayLine | Southern Pacific Railroad ⓘ |
| status | operational (heritage service) ⓘ |
| traction | diesel-electric ⓘ |
| use |
excursion service
ⓘ
heritage service ⓘ |
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: SP 4268 Description of subject: SP 4268 is a preserved Southern Pacific Railroad EMD E-unit diesel locomotive, often featured in heritage and excursion service.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.