United States Air Force Plant 42
E196292
United States Air Force Plant 42 is a major military and aerospace manufacturing and testing complex known for hosting classified and advanced aircraft development programs.
All labels observed (6)
How this entity was disambiguated
This entity first appeared as the object of triple T1757349 — 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: United States Air Force Plant 42 Context triple: [Palmdale, California, hasFacility, United States Air Force Plant 42]
-
A.
Pantex Plant
Pantex Plant is a U.S. nuclear weapons facility in Texas responsible for the assembly, disassembly, and maintenance of the nation’s nuclear warheads.
-
B.
Iowa Ordnance Plant
The Iowa Ordnance Plant was a World War II–era munitions manufacturing facility in Iowa that played a role in the U.S. nuclear weapons program as part of the Manhattan Project.
-
C.
Boeing airplane assembly plant
The Boeing airplane assembly plant in Everett, Washington is one of the world’s largest manufacturing facilities, where Boeing builds wide-body commercial jets such as the 747, 767, 777, and 787 Dreamliner.
-
D.
Andrews Air Force Base
Andrews Air Force Base is a major U.S. military installation in Maryland best known as the home base for Air Force One and other aircraft supporting the President and senior government officials.
-
E.
Wright-Patterson Air Force Base
Wright-Patterson Air Force Base is a major U.S. Air Force installation in Ohio known as a central hub for aerospace research, development, testing, and logistics.
- 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: United States Air Force Plant 42 Target entity description: United States Air Force Plant 42 is a major military and aerospace manufacturing and testing complex known for hosting classified and advanced aircraft development programs.
-
A.
Pantex Plant
Pantex Plant is a U.S. nuclear weapons facility in Texas responsible for the assembly, disassembly, and maintenance of the nation’s nuclear warheads.
-
B.
Iowa Ordnance Plant
The Iowa Ordnance Plant was a World War II–era munitions manufacturing facility in Iowa that played a role in the U.S. nuclear weapons program as part of the Manhattan Project.
-
C.
Boeing airplane assembly plant
The Boeing airplane assembly plant in Everett, Washington is one of the world’s largest manufacturing facilities, where Boeing builds wide-body commercial jets such as the 747, 767, 777, and 787 Dreamliner.
-
D.
Andrews Air Force Base
Andrews Air Force Base is a major U.S. military installation in Maryland best known as the home base for Air Force One and other aircraft supporting the President and senior government officials.
-
E.
Wright-Patterson Air Force Base
Wright-Patterson Air Force Base is a major U.S. Air Force installation in Ohio known as a central hub for aerospace research, development, testing, and logistics.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
aerospace manufacturing complex
ⓘ
military industrial facility ⓘ |
| alsoKnownAs |
United States Air Force Plant 42
ⓘ
surface form:
Air Force Plant 42
|
| associatedWithProgram |
Lockheed F-117 Nighthawk
ⓘ
F-22 Raptor ⓘ
surface form:
Lockheed Martin F-22 Raptor
F-35 Lightning II ⓘ
surface form:
Lockheed Martin F-35 Lightning II
SR-71 Blackbird ⓘ
surface form:
Lockheed SR-71 Blackbird
Lockheed U-2 ⓘ B-2 Spirit ⓘ
surface form:
Northrop B-2 Spirit
B-21 Raider ⓘ
surface form:
Northrop Grumman B-21 Raider
various classified “black” projects ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| distanceToEdwardsAFB | approximately 23 miles ⓘ |
| elevation | approximately 2,500 feet above sea level ⓘ |
| FAAIdentifier | PMD ⓘ |
| hasRunway |
Runway 04/22
ⓘ
Runway 07/25 ⓘ Runway 17/35 ⓘ |
| IATACode | PMD ⓘ |
| ICAOCode | KPMD ⓘ |
| locatedIn |
Antelope Valley
ⓘ
Los Angeles County ⓘ
surface form:
Los Angeles County, California
Mojave Desert ⓘ |
| location | Palmdale, California ⓘ |
| near | Edwards Air Force Base ⓘ |
| notableFor |
advanced aerospace research and development
ⓘ
stealth aircraft development ⓘ |
| operator | United States Air Force ⓘ |
| owner | United States Air Force ⓘ |
| partOf |
United States Air Force Plant 42
self-linksurface differs
ⓘ
surface form:
United States Air Force industrial plant system
|
| runwayLength |
Runway 04/22 approximately 12,000 feet
ⓘ
Runway 07/25 approximately 10,000 feet ⓘ Runway 17/35 approximately 8,000 feet ⓘ |
| runwaySurface | concrete ⓘ |
| securityLevel | high ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| tenant |
Boeing
ⓘ
Lockheed Skunk Works ⓘ
surface form:
Lockheed Martin Skunk Works
Northrop Grumman ⓘ United States Air Force ⓘ |
| timeZone | Pacific Time Zone ⓘ |
| type |
aircraft manufacturing facility
ⓘ
military airfield ⓘ |
| usedFor |
aerospace manufacturing
ⓘ
aircraft assembly ⓘ classified aircraft programs ⓘ flight testing ⓘ maintenance, repair and overhaul of aircraft ⓘ |
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: United States Air Force Plant 42 Description of subject: United States Air Force Plant 42 is a major military and aerospace manufacturing and testing complex known for hosting classified and advanced aircraft development programs.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Air Force Plant 42
this entity surface form:
Northrop Grumman facility, Palmdale, California
this entity surface form:
Air Force Plant 42
subject surface form:
Palmdale Regional Airport
subject surface form:
Palmdale Regional Airport
subject surface form:
Northern Los Angeles County
this entity surface form:
Air Force Plant 42
United States Air Force Plant 42
→
partOf
→
United States Air Force Plant 42
self-linksurface differs
ⓘ
this entity surface form:
United States Air Force industrial plant system
this entity surface form:
Air Force Plant 42
subject surface form:
Boeing facilities in Palmdale, California
subject surface form:
Boeing facilities in Palmdale, California
this entity surface form:
Lockheed Martin facilities at Plant 42
subject surface form:
Boeing facilities in Palmdale, California
this entity surface form:
Northrop Grumman facilities at Plant 42
this entity surface form:
Air Force Plant 42