SP 4263
E665426
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SP 4263 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7429197 — 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 4263 Context triple: [AC-11, fleetNumbers, SP 4263]
-
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 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.
-
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.
S26
S26 is a line of the Berlin S-Bahn urban rail network serving various stations across the Berlin metropolitan area.
-
E.
SaiPa
SaiPa is a Finnish professional ice hockey club based in Lappeenranta that competes in the country’s top-tier Liiga.
- 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 4263 Target entity description: 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.
-
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 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.
-
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.
S26
S26 is a line of the Berlin S-Bahn urban rail network serving various stations across the Berlin metropolitan area.
-
E.
SaiPa
SaiPa is a Finnish professional ice hockey club based in Lappeenranta that competes in the country’s top-tier Liiga.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
Southern Pacific AC-11 steam locomotive
ⓘ
cab-forward locomotive ⓘ |
| belongsToClass | AC-11 ⓘ |
| builder | Baldwin Locomotive Works NERFINISHED ⓘ |
| category | Southern Pacific AC-11 locomotives NERFINISHED ⓘ |
| class | Southern Pacific AC-11 NERFINISHED ⓘ |
| configuration | 4-8-8-2 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designFeature |
articulated frame
ⓘ
cab-forward layout ⓘ |
| fleet | Southern Pacific cab-forward locomotives NERFINISHED ⓘ |
| fuelType | bunker oil ⓘ |
| gauge | standard gauge ⓘ |
| hasWheelArrangement |
2 trailing wheels
ⓘ
4 leading wheels ⓘ two sets of 8 driving wheels ⓘ |
| locomotiveType | Mallet-type articulated ⓘ |
| notableFor | operation through long mountain tunnels and snow sheds ⓘ |
| operator | Southern Pacific Railroad NERFINISHED ⓘ |
| powerType | steam ⓘ |
| railway | Southern Pacific Railroad NERFINISHED ⓘ |
| railwayCompany | Southern Pacific Railroad NERFINISHED ⓘ |
| railwayLine | Southern Pacific Railroad NERFINISHED ⓘ |
| railwayRegion | Southern Pacific system NERFINISHED ⓘ |
| trackGauge | 1,435 mm ⓘ |
| UICClassification | (2′D)D2′ h4 ⓘ |
| usedFor |
freight service
ⓘ
heavy freight service ⓘ |
| whyCabForward | to reduce crew exposure to smoke in tunnels and snow sheds ⓘ |
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 4263 Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.