AC-10
E168628
AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AC-10 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1422818 — 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-10 Context triple: [Southern Pacific Cab Forward locomotive, classificationBySP, AC-10]
-
A.
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.
-
B.
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.
-
C.
Beechcraft T-6 Texan II
The Beechcraft T-6 Texan II is a single-engine turboprop military trainer aircraft widely used by air forces for primary and basic flight training.
-
D.
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.
-
E.
Cessna O-2 Skymaster
The Cessna O-2 Skymaster is a military twin-boom, push-pull configuration aircraft used primarily by the U.S. Air Force for forward air control and reconnaissance during the Vietnam War.
- 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-10 Target entity description: AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
-
A.
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.
-
B.
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.
-
C.
Beechcraft T-6 Texan II
The Beechcraft T-6 Texan II is a single-engine turboprop military trainer aircraft widely used by air forces for primary and basic flight training.
-
D.
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.
-
E.
Cessna O-2 Skymaster
The Cessna O-2 Skymaster is a military twin-boom, push-pull configuration aircraft used primarily by the U.S. Air Force for forward air control and reconnaissance during the Vietnam War.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Southern Pacific Railroad locomotive class
ⓘ
cab-forward locomotive class ⓘ steam locomotive class ⓘ |
| articulationType | Mallet-type articulated ⓘ |
| boilerPressure | 250 psi ⓘ |
| brakeType | air brakes ⓘ |
| buildDate | 1942 ⓘ |
| builder | Baldwin Locomotive Works ⓘ |
| cabLocation | front (cab-forward) ⓘ |
| category |
4-8-8-2 locomotives
ⓘ
Southern Pacific Railroad steam locomotives ⓘ articulated steam locomotives ⓘ |
| configuration | 4-8-8-2 ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | simple expansion ⓘ |
| cylinderCount | 4 ⓘ |
| designer | Southern Pacific Railroad ⓘ |
| driveWheelArrangement | eight driving wheels per engine unit ⓘ |
| family |
Southern Pacific Cab Forward locomotive
ⓘ
surface form:
Southern Pacific AC cab-forward series
|
| firstRunYear | 1942 ⓘ |
| followedByClass | Southern Pacific AC-11 ⓘ |
| fuelType | bunker oil ⓘ |
| gauge | standard gauge ⓘ |
| notableFeature | cab-forward design to reduce crew exposure to smoke in tunnels and snow sheds ⓘ |
| numberInClass | 20 ⓘ |
| operator |
Southern Pacific Railroad
ⓘ
surface form:
Southern Pacific Lines
Southern Pacific Railroad ⓘ |
| operatorRegion |
California, United States
ⓘ
surface form:
California
Nevada ⓘ Oregon ⓘ |
| powerType | steam ⓘ |
| precededByClass | Southern Pacific AC-9 ⓘ |
| primaryRole | heavy freight service ⓘ |
| primaryRouteType | mountainous routes ⓘ |
| railwayCompany | Southern Pacific Railroad ⓘ |
| railwayRegion |
West Coast of the United States
ⓘ
surface form:
U.S. West Coast
|
| retirementPeriod | 1950s ⓘ |
| roadNumbers |
Southern Pacific Cab Forward locomotive
ⓘ
surface form:
Southern Pacific 4205–4224
|
| serviceType | freight ⓘ |
| status | all units scrapped ⓘ |
| trackGauge |
1,435 mm
ⓘ
4 ft 8 1⁄2 in ⓘ |
| trainHeating | none (freight service) ⓘ |
| UICClassification | (2′D)D2′ h4 ⓘ |
| usedOnLine |
Southern Pacific Overland Route
ⓘ
surface form:
Southern Pacific Donner Pass route
Southern Pacific Overland Route ⓘ Southern Pacific Railroad ⓘ
surface form:
Southern Pacific Siskiyou and Cascade lines
|
| valveGear | Walschaerts ⓘ |
| whyteType | 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-10 Description of subject: AC-10 was a class of Southern Pacific Railroad cab-forward articulated steam locomotives built for heavy freight service over mountainous routes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.