Cornalvo Reservoir
E792455
Cornalvo Reservoir is an ancient Roman-built dam and water reservoir in Extremadura, Spain, renowned for its historical engineering and role in supplying water to the city of Mérida.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cornalvo Reservoir canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T9304750 — 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: Cornalvo Reservoir Context triple: [Cornalvo Natural Park, contains, Cornalvo Reservoir]
-
A.
Los Barreales Reservoir
Los Barreales Reservoir is an artificial lake in Argentina’s Neuquén Province, created on the Neuquén River and known for hydroelectric use, water regulation, and nearby paleontological sites.
-
B.
Cíjara Reservoir
Cíjara Reservoir is a major artificial lake in western Spain, created by damming the Guadiana River and used for water storage, hydroelectric power, and regional irrigation.
-
C.
La Paloma Reservoir
La Paloma Reservoir is a major artificial lake in Chile’s Coquimbo Region, known for supporting irrigation and water supply in the Monte Patria area.
-
D.
Burguillo Reservoir
Burguillo Reservoir is a major artificial lake and dam in central Spain, known for regulating water from the Alberche River and serving as a popular site for recreation and hydroelectric power.
-
E.
El Pardo Reservoir
El Pardo Reservoir is a dammed water body near Madrid, Spain, primarily used for water supply, flood control, and recreation along the Manzanares River.
- 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: Cornalvo Reservoir Target entity description: Cornalvo Reservoir is an ancient Roman-built dam and water reservoir in Extremadura, Spain, renowned for its historical engineering and role in supplying water to the city of Mérida.
-
A.
Los Barreales Reservoir
Los Barreales Reservoir is an artificial lake in Argentina’s Neuquén Province, created on the Neuquén River and known for hydroelectric use, water regulation, and nearby paleontological sites.
-
B.
Cíjara Reservoir
Cíjara Reservoir is a major artificial lake in western Spain, created by damming the Guadiana River and used for water storage, hydroelectric power, and regional irrigation.
-
C.
La Paloma Reservoir
La Paloma Reservoir is a major artificial lake in Chile’s Coquimbo Region, known for supporting irrigation and water supply in the Monte Patria area.
-
D.
Burguillo Reservoir
Burguillo Reservoir is a major artificial lake and dam in central Spain, known for regulating water from the Alberche River and serving as a popular site for recreation and hydroelectric power.
-
E.
El Pardo Reservoir
El Pardo Reservoir is a dammed water body near Madrid, Spain, primarily used for water supply, flood control, and recreation along the Manzanares River.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
ancient Roman dam
ⓘ
cultural heritage site ⓘ reservoir ⓘ |
| basinCountry | Spain NERFINISHED ⓘ |
| constructedBy | ancient Romans ⓘ |
| constructionPeriod | Roman Empire NERFINISHED ⓘ |
| continent | Europe ⓘ |
| country | Spain ⓘ |
| currentUse |
nature observation
ⓘ
recreational activities ⓘ water management ⓘ |
| damType | gravity dam ⓘ |
| ecosystemType | Mediterranean ⓘ |
| engineeringSignificance | example of long-lasting Roman hydraulic infrastructure ⓘ |
| hasAccess | road access from Mérida ⓘ |
| hasAge | approximately 2,000 years ⓘ |
| hasBiodiversity |
Mediterranean flora
ⓘ
aquatic birds ⓘ |
| hasOwner | public administration of Spain ⓘ |
| hasPart | Cornalvo Dam NERFINISHED ⓘ |
| hasUse |
environmental education
ⓘ
historical tourism ⓘ |
| heritageDesignation | Bien de Interés Cultural ⓘ |
| heritageDesignationCountry | Spain ⓘ |
| languageOfToponym | Spanish ⓘ |
| locatedIn |
Cornalvo Natural Park
NERFINISHED
ⓘ
Extremadura NERFINISHED ⓘ province of Badajoz NERFINISHED ⓘ |
| locatedNear | Mérida NERFINISHED ⓘ |
| materialUsed |
concrete (later reinforcements)
ⓘ
masonry ⓘ |
| nearbyCity | Mérida NERFINISHED ⓘ |
| notableFor |
Roman engineering
ⓘ
state of preservation ⓘ |
| partOf |
Roman hydraulic system of Augusta Emerita
NERFINISHED
ⓘ
heritage of Mérida area ⓘ |
| primaryFunction | water supply ⓘ |
| protectedAreaStatus | natural park ⓘ |
| region | Autonomous community of Extremadura NERFINISHED ⓘ |
| suppliedWaterTo |
Augusta Emerita
NERFINISHED
ⓘ
Mérida NERFINISHED ⓘ |
| touristAttraction | yes ⓘ |
| usedFor |
drinking water
ⓘ
irrigation ⓘ recreation ⓘ |
| watercourse | Albarregas River NERFINISHED ⓘ |
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: Cornalvo Reservoir Description of subject: Cornalvo Reservoir is an ancient Roman-built dam and water reservoir in Extremadura, Spain, renowned for its historical engineering and role in supplying water to the city of Mérida.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.