C-21A
E284558
The C-21A is a U.S. military transport and medical evacuation aircraft derived from the Learjet 35 business jet.
All labels observed (1)
| Label | Occurrences |
|---|---|
| C-21A canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2628625 — 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: C-21A Context triple: [Learjet 35, variant, C-21A]
-
A.
C-7
C-7 is a commuter rail line in the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
B.
C-2
C-2 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
-
C.
C-2A Greyhound
The C-2A Greyhound is a twin-engine, high-wing cargo aircraft used by the U.S. Navy primarily for carrier onboard delivery of personnel, mail, and supplies to and from aircraft carriers.
-
D.
C-27J Spartan aircraft
The C-27J Spartan aircraft is a twin-engine tactical military transport plane known for its short takeoff and landing capability, rugged design, and versatile cargo and troop-carrying roles.
-
E.
C-10
C-10 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
- 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: C-21A Target entity description: The C-21A is a U.S. military transport and medical evacuation aircraft derived from the Learjet 35 business jet.
-
A.
C-7
C-7 is a commuter rail line in the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
B.
C-2
C-2 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
-
C.
C-2A Greyhound
The C-2A Greyhound is a twin-engine, high-wing cargo aircraft used by the U.S. Navy primarily for carrier onboard delivery of personnel, mail, and supplies to and from aircraft carriers.
-
D.
C-27J Spartan aircraft
The C-27J Spartan aircraft is a twin-engine tactical military transport plane known for its short takeoff and landing capability, rugged design, and versatile cargo and troop-carrying roles.
-
E.
C-10
C-10 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Learjet 35 variant
ⓘ
medical evacuation aircraft ⓘ military transport aircraft ⓘ |
| airframeType | twin-engine business jet ⓘ |
| category |
United States military aircraft
ⓘ
business jet derivative ⓘ twinjet aircraft ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| crew | 2 ⓘ |
| crewType |
co-pilot
ⓘ
pilot ⓘ |
| cruiseSpeed | about 460 knots ⓘ |
| derivedFrom | Learjet 35 ⓘ |
| engineType | turbofan ⓘ |
| enteredService | 1984 ⓘ |
| fuselageType | pressurized cabin ⓘ |
| hasAvionics | military communications equipment ⓘ |
| hasFeature |
cargo loading capability
ⓘ
quick-change interior for medical evacuation ⓘ |
| landingGear | tricycle retractable landing gear ⓘ |
| manufacturer |
Bombardier Aerospace
ⓘ
linked to:
Bombardier
Learjet ⓘ |
| maximumSpeed | about 530 mph ⓘ |
| maximumTakeoffWeight | 18000 lb ⓘ |
| medicalConfigurationCapacity |
1 litter patient
ⓘ
5 ambulatory patients ⓘ |
| militaryDesignationOf |
Learjet 35A
ⓘ
linked to:
Learjet 35
|
| numberOfEngines | 2 ⓘ |
| operator | United States Air Force ⓘ |
| passengerCapacity | 8 passengers ⓘ |
| powerplant | 2 Garrett TFE731 turbofan engines ⓘ |
| primaryUser | United States Air Force ⓘ |
| range | about 2300 nautical miles ⓘ |
| role |
aeromedical evacuation
ⓘ
light transport ⓘ |
| serviceCeiling | 45000 ft ⓘ |
| tailConfiguration | T-tail ⓘ |
| usedBy |
Air Force Reserve Command
ⓘ
linked to:
Air Force Reserve
Air Mobility Command ⓘ Air National Guard ⓘ |
| usedFor |
cargo transport
ⓘ
medical evacuation ⓘ personnel transport ⓘ |
| usedIn |
contingency operations
ⓘ
peacetime airlift missions ⓘ |
| wingConfiguration | low-wing monoplane ⓘ |
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: C-21A Description of subject: The C-21A is a U.S. military transport and medical evacuation aircraft derived from the Learjet 35 business jet.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.