National Lead of Ohio
E543501
National Lead of Ohio was a company that managed uranium processing operations for the U.S. government, notably running the Fernald Feed Materials Production Center during the Cold War.
All labels observed (2)
| Label | Occurrences |
|---|---|
| National Lead Company | 1 |
| National Lead of Ohio canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5782344 — 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: National Lead of Ohio Context triple: [Fernald Feed Materials Production Center, operatedBy, National Lead of Ohio]
-
A.
Clyde, Ohio
Clyde, Ohio is a small city in Sandusky County best known as the childhood home and inspiration for many works of American writer Sherwood Anderson.
-
B.
Fairborn, Ohio
Fairborn, Ohio is a city in Greene County that forms part of the Dayton metropolitan area in southwestern Ohio.
-
C.
Youngstown
Youngstown is an industrial city in northeastern Ohio historically known for its steel production and central role in the Rust Belt’s economic rise and decline.
-
D.
Warren, Ohio
Warren, Ohio is a small industrial city in northeastern Ohio that serves as the county seat of Trumbull County and a historic center of the Mahoning Valley.
-
E.
Edison, Ohio
Edison, Ohio is a small village in north-central Ohio known primarily as the birthplace of inventor Thomas Edison.
- 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: National Lead of Ohio Target entity description: National Lead of Ohio was a company that managed uranium processing operations for the U.S. government, notably running the Fernald Feed Materials Production Center during the Cold War.
-
A.
Clyde, Ohio
Clyde, Ohio is a small city in Sandusky County best known as the childhood home and inspiration for many works of American writer Sherwood Anderson.
-
B.
Fairborn, Ohio
Fairborn, Ohio is a city in Greene County that forms part of the Dayton metropolitan area in southwestern Ohio.
-
C.
Youngstown
Youngstown is an industrial city in northeastern Ohio historically known for its steel production and central role in the Rust Belt’s economic rise and decline.
-
D.
Warren, Ohio
Warren, Ohio is a small industrial city in northeastern Ohio that serves as the county seat of Trumbull County and a historic center of the Mahoning Valley.
-
E.
Edison, Ohio
Edison, Ohio is a small village in north-central Ohio known primarily as the birthplace of inventor Thomas Edison.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | company ⓘ |
| activity |
chemical processing of uranium
ⓘ
metallurgical processing of uranium ⓘ |
| associatedWithAgency | U.S. Department of Energy NERFINISHED ⓘ |
| associatedWithSite | Fernald site NERFINISHED ⓘ |
| contractedBy |
U.S. Atomic Energy Commission
NERFINISHED
ⓘ
United States government NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| employed | workers at Fernald Feed Materials Production Center ⓘ |
| historicalContext | Cold War nuclear weapons production ⓘ |
| impact | environmental contamination at Fernald site ⓘ |
| industry |
nuclear materials processing
ⓘ
uranium processing ⓘ |
| location | Fernald, Ohio NERFINISHED ⓘ |
| managed | uranium processing operations ⓘ |
| operated | Fernald Feed Materials Production Center NERFINISHED ⓘ |
| operationalRole | prime operating contractor at Fernald ⓘ |
| oversightBy |
U.S. Atomic Energy Commission
NERFINISHED
ⓘ
successor nuclear agencies of the U.S. government ⓘ |
| partOf | U.S. nuclear fuel cycle infrastructure ⓘ |
| predecessorOf | later Fernald site contractors ⓘ |
| processedMaterial |
uranium compounds
ⓘ
uranium ore concentrates ⓘ |
| produced | uranium feed materials for nuclear weapons program ⓘ |
| relatedTo | Fernald environmental cleanup ⓘ |
| role | operator of uranium feed materials plant ⓘ |
| servedProgram | U.S. nuclear weapons complex ⓘ |
| state | Ohio ⓘ |
| timePeriod | Cold War ⓘ |
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: National Lead of Ohio Description of subject: National Lead of Ohio was a company that managed uranium processing operations for the U.S. government, notably running the Fernald Feed Materials Production Center during the Cold War.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Fernald Feed Materials Production Center
this entity surface form:
National Lead Company