Angostura Reservoir
E619548
Angostura Reservoir is a man-made lake in South Dakota used primarily for irrigation, recreation, and wildlife habitat.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Angostura Reservoir canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T6805874 — 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: Angostura Reservoir Context triple: [Angostura Dam, hasReservoir, Angostura Reservoir]
-
A.
Cúber reservoir
Cúber reservoir is an artificial mountain lake in Mallorca, Spain, known for supplying water to the island and for its scenic setting in the Serra de Tramuntana.
-
B.
Itumbiara Reservoir
Itumbiara Reservoir is a large artificial lake in Brazil created for hydroelectric power generation and water regulation on the Paranaíba River.
-
C.
Chicoasén Dam
Chicoasén Dam is a major hydroelectric dam in Chiapas, Mexico, known as one of the largest power-generating facilities in the country.
-
D.
El Chocón Dam
El Chocón Dam is a large hydroelectric dam in Argentina known for its significant role in power generation and flood control on the Limay River.
-
E.
Lago Chico
Lago Chico is a small mountain lake in southern Chile’s Huerquehue National Park, known for its tranquil forested surroundings and scenic hiking access.
- 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: Angostura Reservoir Target entity description: Angostura Reservoir is a man-made lake in South Dakota used primarily for irrigation, recreation, and wildlife habitat.
-
A.
Cúber reservoir
Cúber reservoir is an artificial mountain lake in Mallorca, Spain, known for supplying water to the island and for its scenic setting in the Serra de Tramuntana.
-
B.
Itumbiara Reservoir
Itumbiara Reservoir is a large artificial lake in Brazil created for hydroelectric power generation and water regulation on the Paranaíba River.
-
C.
Chicoasén Dam
Chicoasén Dam is a major hydroelectric dam in Chiapas, Mexico, known as one of the largest power-generating facilities in the country.
-
D.
El Chocón Dam
El Chocón Dam is a large hydroelectric dam in Argentina known for its significant role in power generation and flood control on the Limay River.
-
E.
Lago Chico
Lago Chico is a small mountain lake in southern Chile’s Huerquehue National Park, known for its tranquil forested surroundings and scenic hiking access.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| country |
United States
ⓘ
linked to:
United States of America
|
| createdBy | Angostura Dam ⓘ |
| hasActivity |
boating
ⓘ
camping ⓘ fishing ⓘ swimming ⓘ wildlife viewing ⓘ |
| hasFishSpecies |
crappie
ⓘ
largemouth bass ⓘ northern pike ⓘ smallmouth bass ⓘ walleye ⓘ yellow perch ⓘ |
| hasNearbyProtectedArea | Angostura Recreation Area ⓘ |
| hasRecreationManagement | South Dakota Department of Game, Fish and Parks ⓘ |
| hasShorelineFeature |
campgrounds
ⓘ
public boat ramps ⓘ swimming beaches ⓘ |
| hasWildlife |
game fish
ⓘ
shorebirds ⓘ waterfowl ⓘ |
| inflow | Cheyenne River ⓘ |
| locatedIn |
Black Hills region
ⓘ
linked to:
Black Hills
Fall River County, South Dakota ⓘ South Dakota ⓘ |
| managingAgency |
U.S. Bureau of Reclamation
ⓘ
linked to:
Bureau of Reclamation
|
| nearCity | Hot Springs, South Dakota ⓘ |
| outflow | Cheyenne River ⓘ |
| partOf |
Missouri River watershed
ⓘ
linked to:
Missouri River Basin
|
| primaryUse |
irrigation
ⓘ
recreation ⓘ wildlife habitat ⓘ |
| region | western South Dakota ⓘ |
| usedFor |
flood control
ⓘ
habitat for migratory birds ⓘ irrigation water storage ⓘ water-based recreation ⓘ |
| watercourse | Cheyenne River ⓘ |
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: Angostura Reservoir Description of subject: Angostura Reservoir is a man-made lake in South Dakota used primarily for irrigation, recreation, and wildlife habitat.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.