KC-X program
E149560
The KC-X program was a U.S. Air Force acquisition initiative to develop and procure a next-generation aerial refueling tanker to replace aging KC-135 aircraft.
All labels observed (3)
| Label | Occurrences |
|---|---|
| KC-X program canonical | 4 |
| KC-X | 1 |
| KC-X tanker competition | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1301151 — 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: KC-X program Context triple: [Boeing KC-46 Pegasus, programOrigin, KC-X program]
-
A.
Joint Strike Fighter program
The Joint Strike Fighter program is a multinational defense initiative led by the United States to develop and produce the F-35 Lightning II family of advanced stealth multirole combat aircraft.
-
B.
Joint Advanced Strike Technology program
The Joint Advanced Strike Technology program was a U.S. defense research and development initiative that laid the technological and conceptual groundwork for what became the Joint Strike Fighter (F-35) program.
-
C.
VC-25B Presidential Aircraft Recapitalization program
The VC-25B Presidential Aircraft Recapitalization program is the U.S. Air Force initiative to design, modify, and field the next generation of highly secure, long-range aircraft that will serve as the primary presidential transport.
-
D.
Lockheed Martin X-series
The Lockheed Martin X-series is a family of experimental aircraft developed to test and demonstrate advanced aerospace technologies and concepts.
-
E.
Lockheed Martin X-35
The Lockheed Martin X-35 is a prototype stealth multirole fighter that served as the demonstrator for the F-35 Lightning II Joint Strike Fighter program.
- 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: KC-X program Target entity description: The KC-X program was a U.S. Air Force acquisition initiative to develop and procure a next-generation aerial refueling tanker to replace aging KC-135 aircraft.
-
A.
Joint Strike Fighter program
The Joint Strike Fighter program is a multinational defense initiative led by the United States to develop and produce the F-35 Lightning II family of advanced stealth multirole combat aircraft.
-
B.
Joint Advanced Strike Technology program
The Joint Advanced Strike Technology program was a U.S. defense research and development initiative that laid the technological and conceptual groundwork for what became the Joint Strike Fighter (F-35) program.
-
C.
VC-25B Presidential Aircraft Recapitalization program
The VC-25B Presidential Aircraft Recapitalization program is the U.S. Air Force initiative to design, modify, and field the next generation of highly secure, long-range aircraft that will serve as the primary presidential transport.
-
D.
Lockheed Martin X-series
The Lockheed Martin X-series is a family of experimental aircraft developed to test and demonstrate advanced aerospace technologies and concepts.
-
E.
Lockheed Martin X-35
The Lockheed Martin X-35 is a prototype stealth multirole fighter that served as the demonstrator for the F-35 Lightning II Joint Strike Fighter program.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
United States Air Force program
ⓘ
military procurement program ⓘ |
| acquisitionCategory | major defense acquisition program ⓘ |
| acquisitionPhase | replacement of first tranche of KC-135 tankers ⓘ |
| aircraftRole | aerial refueling tanker ⓘ |
| budgetingAuthority |
U.S. Congress
ⓘ
linked to:
United States Congress
|
| contractType | fixed-price incentive contract ⓘ |
| controversy | source selection and protest process ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| finalContractAwardYear | 2011 ⓘ |
| followOnPhases |
KC-Y
ⓘ
KC-Z ⓘ |
| industrialCompetitors |
Airbus
ⓘ
Boeing ⓘ EADS ⓘ Northrop Grumman ⓘ |
| initialAwardStatus | protested by Boeing ⓘ |
| initialAwardYear | 2008 ⓘ |
| initialCompetitionWinner |
Northrop Grumman–EADS
ⓘ
linked to:
Northrop Grumman
|
| initialSelectedAircraft |
Airbus A330 MRTT-based tanker
ⓘ
linked to:
Airbus A330 MRTT Phénix
KC-45A ⓘ |
| managedBy |
Air Force Life Cycle Management Center
ⓘ
Air Force Materiel Command ⓘ |
| missionType | air-to-air refueling ⓘ |
| operator | United States Air Force ⓘ |
| oversightBody |
U.S. Department of Defense Inspector General
ⓘ
linked to:
Department of Defense Inspector General
U.S. Government Accountability Office ⓘ
linked to:
Government Accountability Office
|
| phaseInSequence | first phase of USAF tanker recapitalization ⓘ |
| platformType | commercial-derivative aircraft ⓘ |
| primaryUser | Air Mobility Command ⓘ |
| protestOutcome | Government Accountability Office sustained Boeing protest ⓘ |
| purpose |
development of next-generation aerial refueling tanker
ⓘ
procurement of next-generation aerial refueling tanker ⓘ |
| recompetitionOrderedBy |
U.S. Department of Defense
ⓘ
linked to:
Department of Defense
|
| recompetitionYear | 2010 ⓘ |
| relatedCommand | Air Mobility Command ⓘ |
| relatedDoctrine | air mobility ⓘ |
| replaces |
KC-135 Stratotanker
ⓘ
linked to:
Boeing KC-135 Stratotanker
|
| resultedIn |
KC-46A Pegasus
ⓘ
linked to:
Boeing KC-46 Pegasus
|
| secondaryMission |
cargo transport
ⓘ
medical evacuation ⓘ passenger transport ⓘ |
| selectedAircraft |
Boeing 767-based tanker
ⓘ
linked to:
Boeing KC-46 Pegasus
Boeing KC-46A ⓘ
linked to:
Boeing KC-46 Pegasus
|
| serviceBranch |
U.S. Air Force
ⓘ
linked to:
United States Air Force
|
| serviceLifeTarget | replacement of aging KC-135 fleet ⓘ |
| successorProgram |
KC-Y program
ⓘ
KC-Z program ⓘ |
| winningBidder | Boeing ⓘ |
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: KC-X program Description of subject: The KC-X program was a U.S. Air Force acquisition initiative to develop and procure a next-generation aerial refueling tanker to replace aging KC-135 aircraft.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: KC-X program
linked to: KC-X program