SP 4247
E665425
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SP 4247 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7429181 — 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 4247 Context triple: [AC-11, fleetNumbers, SP 4247]
-
A.
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.
-
B.
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.
-
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.
SR 427
SR 427 is a Nevada state highway that serves as a connector route in the western part of the state, linking local communities and major roadways.
-
E.
S47
S47 is a line of the Berlin S-Bahn urban rail network serving parts of the German capital and its surrounding area.
- 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 4247 Target entity description: 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.
-
A.
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.
-
B.
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.
-
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.
SR 427
SR 427 is a Nevada state highway that serves as a connector route in the western part of the state, linking local communities and major roadways.
-
E.
S47
S47 is a line of the Berlin S-Bahn urban rail network serving parts of the German capital and its surrounding area.
- F. None of above. chosen
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
Southern Pacific AC-11 locomotive
ⓘ
cab-forward locomotive ⓘ |
| belongsToClass | AC-11 ⓘ |
| boilerPosition | ahead of cab ⓘ |
| cabPosition | at front of locomotive ⓘ |
| category |
Southern Pacific Railroad locomotives
ⓘ
steam locomotive of the United States ⓘ |
| class | Southern Pacific AC-11 ⓘ |
| configuration | 4-8-8-2 ⓘ |
| countryOfOperation |
United States
ⓘ
linked to:
United States of America
|
| designFeature |
articulated frame
ⓘ
cab-forward layout ⓘ |
| family |
Southern Pacific AC-class cab-forwards
ⓘ
linked to:
Southern Pacific Cab Forward locomotive
|
| fuelType | bunker oil ⓘ |
| gauge |
4 ft 8 1⁄2 in
ⓘ
standard gauge ⓘ |
| hasArticulation | Mallet-type articulation ⓘ |
| notableFor |
being part of Southern Pacific’s cab-forward fleet
ⓘ
use in long, heavy freight trains ⓘ |
| operator | Southern Pacific Railroad ⓘ |
| powerType | steam ⓘ |
| primaryRole | freight locomotive ⓘ |
| railroadFleet |
Southern Pacific cab-forward locomotives
ⓘ
linked to:
Southern Pacific Cab Forward locomotive
|
| railwayCompany |
Southern Pacific
ⓘ
linked to:
Southern Pacific Railroad
|
| railwayLineUsed | Southern Pacific Railroad ⓘ |
| regionOfOperation |
Western United States
ⓘ
linked to:
western United States
|
| subclassOf |
Southern Pacific AC-10 through AC-12 series
ⓘ
linked to:
Southern Pacific AC-10
|
| traction | steam-powered driving wheels ⓘ |
| UICClassification | (2′D)D2′ h4 ⓘ |
| use |
heavy freight service
ⓘ
mountain railroading ⓘ |
| wheelArrangement | 4-8-8-2 ⓘ |
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: SP 4247 Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.