AC-11
E171444
AC-11 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives designed for heavy freight service over mountainous routes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AC-11 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1422819 — 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: AC-11 Context triple: [Southern Pacific Cab Forward locomotive, classificationBySP, AC-11]
-
A.
AC-10
AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
-
B.
AC-8
AC-8 was a class of Southern Pacific Railroad articulated steam locomotives in the distinctive cab-forward configuration, used primarily for heavy freight service over mountainous routes in the early 20th century.
-
C.
AC-5
AC-5 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built in the late 1920s for heavy freight service over mountainous routes.
-
D.
AC-9
The AC-9 was a class of massive 2-8-8-4 articulated steam locomotives built for the Southern Pacific Railroad, notable for their conventional (non-cab-forward) design and use in heavy freight service.
-
E.
Alpha Jet
The Alpha Jet is a light attack and advanced jet trainer aircraft developed jointly by France and Germany in the 1970s and widely used for pilot training and tactical support roles.
- 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: AC-11 Target entity description: AC-11 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives designed for heavy freight service over mountainous routes.
-
A.
AC-10
AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
-
B.
AC-8
AC-8 was a class of Southern Pacific Railroad articulated steam locomotives in the distinctive cab-forward configuration, used primarily for heavy freight service over mountainous routes in the early 20th century.
-
C.
AC-5
AC-5 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built in the late 1920s for heavy freight service over mountainous routes.
-
D.
AC-9
The AC-9 was a class of massive 2-8-8-4 articulated steam locomotives built for the Southern Pacific Railroad, notable for their conventional (non-cab-forward) design and use in heavy freight service.
-
E.
Alpha Jet
The Alpha Jet is a light attack and advanced jet trainer aircraft developed jointly by France and Germany in the 1970s and widely used for pilot training and tactical support roles.
- F. None of above. chosen
Statements (63)
| Predicate | Object |
|---|---|
| instanceOf |
Southern Pacific Railroad locomotive class
ⓘ
steam locomotive class ⓘ |
| articulationType | articulated locomotive ⓘ |
| brakeType | air brakes ⓘ |
| buildDate |
1942
ⓘ
1943 ⓘ |
| builder | Baldwin Locomotive Works ⓘ |
| configuration | cab-forward ⓘ |
| countryOfOperation |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | simple expansion ⓘ |
| cylinderCount | 4 ⓘ |
| designedFor | heavy freight service ⓘ |
| fleetNumbers |
SP 4245
ⓘ
SP 4246 ⓘ SP 4247 ⓘ SP 4248 ⓘ SP 4249 ⓘ SP 4250 ⓘ SP 4251 ⓘ SP 4252 ⓘ SP 4253 ⓘ SP 4254 ⓘ SP 4255 ⓘ SP 4256 ⓘ SP 4257 ⓘ SP 4258 ⓘ SP 4259 ⓘ SP 4260 ⓘ SP 4261 ⓘ SP 4262 ⓘ SP 4263 ⓘ SP 4264 ⓘ SP 4265 ⓘ SP 4266 ⓘ SP 4267 ⓘ SP 4268 ⓘ SP 4269 ⓘ SP 4270 ⓘ SP 4271 ⓘ SP 4272 ⓘ SP 4273 ⓘ SP 4274 ⓘ SP 4275 ⓘ SP 4276 ⓘ SP 4277 ⓘ SP 4278 ⓘ SP 4279 ⓘ |
| fuelType | bunker oil ⓘ |
| gauge | standard gauge ⓘ |
| noPreservedExamples | true ⓘ |
| numberInClass | 30 ⓘ |
| operator | Southern Pacific Railroad ⓘ |
| powerType | steam ⓘ |
| primaryRouteType | mountainous routes ⓘ |
| railroad | Southern Pacific Railroad ⓘ |
| retirementPeriod | 1950s ⓘ |
| status | all units scrapped ⓘ |
| trackGauge | 4 ft 8 1⁄2 in ⓘ |
| UICClassification | (2′C)C2′ h4 ⓘ |
| usedOn |
Cascade Range routes
ⓘ
Sierra Nevada routes ⓘ |
| valveGear | Walschaerts ⓘ |
| WhyteNotation | 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: AC-11 Description of subject: AC-11 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives designed for heavy freight service over mountainous routes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.