Douglas DC-7
E442593
The Douglas DC-7 is a long-range, four‑engine propeller-driven airliner introduced in the 1950s, known as one of the last major piston-powered transports before the jet age.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Douglas DC-7 canonical | 4 |
| Douglas DC-7 (conceptual lineage) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4476584 — 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: Douglas DC-7 Context triple: [Wright R-3350 Duplex-Cyclone, notableApplication, Douglas DC-7]
-
A.
Douglas DC-6
The Douglas DC-6 is a four-engine, propeller-driven airliner and cargo aircraft introduced in the late 1940s, widely used by airlines and militaries around the world for medium- to long-haul flights.
-
B.
Boeing 377 Stratocruiser
The Boeing 377 Stratocruiser was a large, luxurious post–World War II long-range airliner derived from the C-97 Stratofreighter, noted for its double-deck cabin and use on premier international routes.
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C.
Douglas DC-8
The Douglas DC-8 is a long-range, narrow-body jet airliner introduced in the late 1950s that became one of the early mainstays of commercial jet aviation.
-
D.
Lockheed C‑69 Constellation
The Lockheed C‑69 Constellation was a World War II-era four‑engined military transport aircraft that served as the precursor to the famous Lockheed Constellation airliner.
-
E.
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.
- 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: Douglas DC-7 Target entity description: The Douglas DC-7 is a long-range, four‑engine propeller-driven airliner introduced in the 1950s, known as one of the last major piston-powered transports before the jet age.
-
A.
Douglas DC-6
The Douglas DC-6 is a four-engine, propeller-driven airliner and cargo aircraft introduced in the late 1940s, widely used by airlines and militaries around the world for medium- to long-haul flights.
-
B.
Boeing 377 Stratocruiser
The Boeing 377 Stratocruiser was a large, luxurious post–World War II long-range airliner derived from the C-97 Stratofreighter, noted for its double-deck cabin and use on premier international routes.
-
C.
Douglas DC-8
The Douglas DC-8 is a long-range, narrow-body jet airliner introduced in the late 1950s that became one of the early mainstays of commercial jet aviation.
-
D.
Lockheed C‑69 Constellation
The Lockheed C‑69 Constellation was a World War II-era four‑engined military transport aircraft that served as the precursor to the famous Lockheed Constellation airliner.
-
E.
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.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
airliner
ⓘ
four-engined aircraft ⓘ piston-engined airliner ⓘ |
| aircraftRole |
cargo transport
ⓘ
long-range airliner ⓘ passenger transport ⓘ |
| configuration | low-wing monoplane ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crew | 3 ⓘ |
| cruiseSpeed | 580 km/h ⓘ |
| DC-7CNickname | Seven Seas NERFINISHED ⓘ |
| developedFrom | Douglas DC-6 NERFINISHED ⓘ |
| engineType | piston engine ⓘ |
| enteredServiceWith | American Airlines NERFINISHED ⓘ |
| firstFlight | 1953-05-18 ⓘ |
| firstOperator | American Airlines NERFINISHED ⓘ |
| height | 10.29 m ⓘ |
| ICAOTypeDesignator | DC7 NERFINISHED ⓘ |
| introduced | 1953 ⓘ |
| landingGear | tricycle landing gear ⓘ |
| length | 34.65 m ⓘ |
| manufacturer | Douglas Aircraft Company NERFINISHED ⓘ |
| maximumPassengerCapacity | 105 ⓘ |
| maximumSpeed | 644 km/h ⓘ |
| maximumTakeoffWeight | 61,235 kg ⓘ |
| notableFeature | one of the last major piston-powered long-range airliners before the jet age ⓘ |
| numberBuilt | 338 ⓘ |
| powerplant | 4 × Wright R-3350 Duplex-Cyclone radial engines ⓘ |
| pressurizedCabin | yes ⓘ |
| primaryUser |
American Airlines
NERFINISHED
ⓘ
BOAC NERFINISHED ⓘ Pan American World Airways NERFINISHED ⓘ United Airlines NERFINISHED ⓘ |
| productionEnd | 1958 ⓘ |
| productionStart | 1953 ⓘ |
| range | 7,200 km ⓘ |
| retiredFromAirlineService | 1970s ⓘ |
| serviceCeiling | 7,600 m ⓘ |
| status | retired ⓘ |
| successor | Douglas DC-8 NERFINISHED ⓘ |
| tailConfiguration | conventional tail ⓘ |
| typicalPassengerCapacity | 69 ⓘ |
| usedFor |
transatlantic flights
ⓘ
transcontinental flights ⓘ |
| variant |
Douglas DC-7A
NERFINISHED
ⓘ
Douglas DC-7B NERFINISHED ⓘ Douglas DC-7C NERFINISHED ⓘ Douglas DC-7F NERFINISHED ⓘ |
| wingArea | 134.3 m² ⓘ |
| wingspan | 38.86 m ⓘ |
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: Douglas DC-7 Description of subject: The Douglas DC-7 is a long-range, four‑engine propeller-driven airliner introduced in the 1950s, known as one of the last major piston-powered transports before the jet age.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Wright R-3350 Duplex-Cyclone
this entity surface form:
Douglas DC-7 (conceptual lineage)