Southern Pacific AC-9
E649259
The Southern Pacific AC-9 was a class of massive articulated 2-8-8-4 steam locomotives built in the late 1930s for the Southern Pacific Railroad, primarily used for heavy freight service across challenging western routes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Southern Pacific AC-9 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T7196547 — 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: Southern Pacific AC-9 Context triple: [AC-10, precededByClass, Southern Pacific AC-9]
-
A.
Convair 440
The Convair 440 is a twin-engine, short- to medium-range commercial airliner developed in the 1950s as an improved, pressurized variant of Convair’s successful series of piston-powered passenger aircraft.
-
B.
Fairchild C-82 Packet
The Fairchild C-82 Packet was an American twin-boom, twin-engine military transport aircraft developed during World War II for cargo and paratroop operations.
-
C.
Boeing Air Transport
Boeing Air Transport was an early American airline and a predecessor of United Airlines that operated mail and passenger services in the late 1920s and early 1930s.
-
D.
Lockheed L-188 Electra
The Lockheed L-188 Electra is an American four‑engine turboprop airliner introduced in the late 1950s, known for its use in both passenger and cargo operations worldwide.
-
E.
Douglas DC-5
The Douglas DC-5 is a twin-engine, short-haul airliner developed in the late 1930s, notable as one of the earliest commercial aircraft with a high-wing design and tricycle landing gear.
- 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: Southern Pacific AC-9 Target entity description: The Southern Pacific AC-9 was a class of massive articulated 2-8-8-4 steam locomotives built in the late 1930s for the Southern Pacific Railroad, primarily used for heavy freight service across challenging western routes.
-
A.
Convair 440
The Convair 440 is a twin-engine, short- to medium-range commercial airliner developed in the 1950s as an improved, pressurized variant of Convair’s successful series of piston-powered passenger aircraft.
-
B.
Fairchild C-82 Packet
The Fairchild C-82 Packet was an American twin-boom, twin-engine military transport aircraft developed during World War II for cargo and paratroop operations.
-
C.
Boeing Air Transport
Boeing Air Transport was an early American airline and a predecessor of United Airlines that operated mail and passenger services in the late 1920s and early 1930s.
-
D.
Lockheed L-188 Electra
The Lockheed L-188 Electra is an American four‑engine turboprop airliner introduced in the late 1950s, known for its use in both passenger and cargo operations worldwide.
-
E.
Douglas DC-5
The Douglas DC-5 is a twin-engine, short-haul airliner developed in the late 1930s, notable as one of the earliest commercial aircraft with a high-wing design and tricycle landing gear.
- F. None of above. chosen
Statements (50)
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: Southern Pacific AC-9 Description of subject: The Southern Pacific AC-9 was a class of massive articulated 2-8-8-4 steam locomotives built in the late 1930s for the Southern Pacific Railroad, primarily used for heavy freight service across challenging western routes.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.