Itaipu Lake
E748690
Itaipu Lake is a vast artificial reservoir on the Paraná River formed by the Itaipu Dam, one of the world’s largest hydroelectric power plants, on the border between Brazil and Paraguay.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Itaipu Lake canonical | 1 |
| Itaipu Reservoir | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8655913 — 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: Itaipu Lake Context triple: [Paraná (state), contains, Itaipu Lake]
-
A.
Dique do Tororó
Dique do Tororó is a historic urban lake and recreational area in Salvador, Bahia, known for its scenic views and large sculptures of Afro-Brazilian orixás.
-
B.
Angostura Reservoir
Angostura Reservoir is a man-made lake in South Dakota used primarily for irrigation, recreation, and wildlife habitat.
-
C.
Salto Grande Reservoir
Salto Grande Reservoir is a large artificial lake on the Uruguay River, created by the Salto Grande Dam on the border between Argentina and Uruguay, used for hydroelectric power generation, irrigation, and recreation.
-
D.
Salto Grande Dam
Salto Grande Dam is a large hydroelectric dam and binational power station on the Uruguay River, jointly operated by Argentina and Uruguay.
-
E.
Uru Uru Lake
Uru Uru Lake is a shallow, high-altitude saline lake in the Bolivian Altiplano, known for its ecological importance and vulnerability to pollution and water level fluctuations.
- 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: Itaipu Lake Target entity description: Itaipu Lake is a vast artificial reservoir on the Paraná River formed by the Itaipu Dam, one of the world’s largest hydroelectric power plants, on the border between Brazil and Paraguay.
-
A.
Dique do Tororó
Dique do Tororó is a historic urban lake and recreational area in Salvador, Bahia, known for its scenic views and large sculptures of Afro-Brazilian orixás.
-
B.
Angostura Reservoir
Angostura Reservoir is a man-made lake in South Dakota used primarily for irrigation, recreation, and wildlife habitat.
-
C.
Salto Grande Reservoir
Salto Grande Reservoir is a large artificial lake on the Uruguay River, created by the Salto Grande Dam on the border between Argentina and Uruguay, used for hydroelectric power generation, irrigation, and recreation.
-
D.
Salto Grande Dam
Salto Grande Dam is a large hydroelectric dam and binational power station on the Uruguay River, jointly operated by Argentina and Uruguay.
-
E.
Uru Uru Lake
Uru Uru Lake is a shallow, high-altitude saline lake in the Bolivian Altiplano, known for its ecological importance and vulnerability to pollution and water level fluctuations.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| associatedWith |
Itaipu Binacional
ⓘ
linked to:
Itaipu Dam
|
| basinCountry |
Brazil
ⓘ
Paraguay ⓘ |
| borderRiverSection | Brazil–Paraguay border ⓘ |
| continent | South America ⓘ |
| country |
Brazil
ⓘ
Paraguay ⓘ |
| createdAs | flooded area upstream of Itaipu Dam ⓘ |
| createdBy | construction of Itaipu Dam ⓘ |
| createdInContextOf |
Itaipu Dam hydroelectric project
ⓘ
linked to:
Itaipu Dam
|
| crossesPoliticalBoundary |
Brazil–Paraguay international boundary
ⓘ
linked to:
Brazil–Paraguay border
|
| ecosystemImpact |
creation of new aquatic habitats
ⓘ
flooding of former terrestrial areas ⓘ |
| formedBy | Itaipu Dam ⓘ |
| governedBy | binational agreements between Brazil and Paraguay ⓘ |
| hasFunction |
regulation of river flow
ⓘ
water storage for power generation ⓘ |
| hasRecreationalActivity |
boating
ⓘ
sightseeing ⓘ sport fishing ⓘ |
| hasTourismAttraction |
boat tours near Itaipu Dam
ⓘ
panoramic views of Itaipu Dam ⓘ |
| inflow | Paraná River ⓘ |
| locatedIn | border between Brazil and Paraguay ⓘ |
| locatedInHydrologicalBasin |
La Plata River basin
ⓘ
Paraná River basin ⓘ
linked to:
Paraná–Paraguay Basin
|
| locatedInRegion |
Paraguay Eastern Region
ⓘ
linked to:
Paraguayan Oriental Region
Paraná state ⓘ |
| locatedOnRiver | Paraná River ⓘ |
| nearCity |
Ciudad del Este
ⓘ
Foz do Iguaçu ⓘ Hernandarias ⓘ Santa Terezinha de Itaipu ⓘ |
| outflow | Paraná River ⓘ |
| partOf |
Itaipu Hydroelectric Complex
ⓘ
linked to:
Itaipu Dam
|
| purpose | support operation of Itaipu hydroelectric power plant ⓘ |
| relatedInfrastructure |
Itaipu Dam navigation facilities
ⓘ
Itaipu Dam spillway ⓘ
linked to:
Itaipu Dam
|
| use |
fishing
ⓘ
hydroelectric power generation ⓘ navigation ⓘ recreation ⓘ tourism ⓘ |
| waterBodyType | freshwater lake ⓘ |
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: Itaipu Lake Description of subject: Itaipu Lake is a vast artificial reservoir on the Paraná River formed by the Itaipu Dam, one of the world’s largest hydroelectric power plants, on the border between Brazil and Paraguay.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Paraná state
linked to: Itaipu Lake