Portsmouth Reservation
E566441
Portsmouth Reservation is a U.S. Department of Energy site in southern Ohio that hosts the Portsmouth Gaseous Diffusion Plant and related nuclear and environmental facilities.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Portsmouth Reservation canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6086316 — 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: Portsmouth Reservation Context triple: [Portsmouth Gaseous Diffusion Plant, locatedOn, Portsmouth Reservation]
-
A.
Johnson's Island
Johnson's Island is a small island in Sandusky Bay on Lake Erie, best known as the site of a major Union prison camp for Confederate officers during the American Civil War.
-
B.
Thompson Island
Thompson Island is a largely undeveloped island in Boston Harbor known for its natural landscapes, outdoor education programs, and role as a recreational and conservation area near the city.
-
C.
Sandy Point State Reservation
Sandy Point State Reservation is a coastal Massachusetts state park at the southern tip of Plum Island known for its sandy beaches, birdwatching, and protected wildlife habitat.
-
D.
Cape Porpoise
Cape Porpoise is a small, historic coastal village and harbor in southern Maine known for its working lobster fleet, scenic islands, and classic New England charm.
-
E.
Deer Island
Deer Island is a peninsula in Boston Harbor best known for housing one of the largest wastewater treatment plants in the United States and for its history as a former immigration and quarantine station.
- 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: Portsmouth Reservation Target entity description: Portsmouth Reservation is a U.S. Department of Energy site in southern Ohio that hosts the Portsmouth Gaseous Diffusion Plant and related nuclear and environmental facilities.
-
A.
Johnson's Island
Johnson's Island is a small island in Sandusky Bay on Lake Erie, best known as the site of a major Union prison camp for Confederate officers during the American Civil War.
-
B.
Thompson Island
Thompson Island is a largely undeveloped island in Boston Harbor known for its natural landscapes, outdoor education programs, and role as a recreational and conservation area near the city.
-
C.
Sandy Point State Reservation
Sandy Point State Reservation is a coastal Massachusetts state park at the southern tip of Plum Island known for its sandy beaches, birdwatching, and protected wildlife habitat.
-
D.
Cape Porpoise
Cape Porpoise is a small, historic coastal village and harbor in southern Maine known for its working lobster fleet, scenic islands, and classic New England charm.
-
E.
Deer Island
Deer Island is a peninsula in Boston Harbor best known for housing one of the largest wastewater treatment plants in the United States and for its history as a former immigration and quarantine station.
- F. None of above. chosen
Statements (28)
| Predicate | Object |
|---|---|
| instanceOf |
United States Department of Energy site
ⓘ
nuclear facility site ⓘ |
| category |
Environmental remediation sites in the United States
ⓘ
Nuclear technology sites in the United States ⓘ United States Department of Energy facilities in Ohio NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| hasEnvironmentalActivity |
facility decommissioning
ⓘ
groundwater monitoring ⓘ soil remediation ⓘ waste treatment ⓘ |
| hostsFacility |
Portsmouth Gaseous Diffusion Plant
NERFINISHED
ⓘ
decontamination and decommissioning facilities ⓘ environmental remediation facilities ⓘ nuclear facilities ⓘ waste management facilities ⓘ |
| locatedIn |
Pike County, Ohio
NERFINISHED
ⓘ
southern Ohio NERFINISHED ⓘ |
| near |
Piketon, Ohio
NERFINISHED
ⓘ
Portsmouth, Ohio NERFINISHED ⓘ |
| operator | United States Department of Energy NERFINISHED ⓘ |
| ownedBy | United States Department of Energy NERFINISHED ⓘ |
| partOf | DOE nuclear weapons complex (legacy sites) NERFINISHED ⓘ |
| regulatoryAuthority | United States Department of Energy Office of Environmental Management NERFINISHED ⓘ |
| regulatoryFramework |
U.S. federal environmental laws
ⓘ
nuclear safety regulations ⓘ |
| usedFor |
environmental cleanup
ⓘ
long-term stewardship of former nuclear production facilities ⓘ uranium enrichment support activities (historically via Portsmouth Gaseous Diffusion Plant) ⓘ |
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: Portsmouth Reservation Description of subject: Portsmouth Reservation is a U.S. Department of Energy site in southern Ohio that hosts the Portsmouth Gaseous Diffusion Plant and related nuclear and environmental facilities.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Portsmouth Gaseous Diffusion Plant