Iskar Reservoir
E693815
Iskar Reservoir is a large artificial lake in western Bulgaria that serves as a major source of drinking water, irrigation, and recreation for the Sofia region.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Iskar Reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7791036 — 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: Iskar Reservoir Context triple: [Iskar River, passesThrough, Iskar Reservoir]
-
A.
Orava Reservoir
Orava Reservoir is a large artificial lake in northern Slovakia known for its scenic surroundings, recreational activities, and role in flood control and hydroelectric power generation.
-
B.
Plavinas Reservoir
Plavinas Reservoir is an artificial lake in Latvia formed on the Daugava River to support the operations of the Plavinas Hydroelectric Power Plant.
-
C.
Gorg Blau reservoir
Gorg Blau reservoir is an artificial mountain lake in Mallorca, Spain, serving as a key freshwater supply within the Serra de Tramuntana range.
-
D.
Ruza Reservoir
Ruza Reservoir is a large artificial lake in the Moscow region of Russia, created by damming the Ruza River to serve as a key source of water supply and recreation.
-
E.
Koka Reservoir
Koka Reservoir is a major artificial lake in Ethiopia formed by the Koka Dam on the Awash River, serving as an important source of hydroelectric power, irrigation, and fisheries.
- 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: Iskar Reservoir Target entity description: Iskar Reservoir is a large artificial lake in western Bulgaria that serves as a major source of drinking water, irrigation, and recreation for the Sofia region.
-
A.
Orava Reservoir
Orava Reservoir is a large artificial lake in northern Slovakia known for its scenic surroundings, recreational activities, and role in flood control and hydroelectric power generation.
-
B.
Plavinas Reservoir
Plavinas Reservoir is an artificial lake in Latvia formed on the Daugava River to support the operations of the Plavinas Hydroelectric Power Plant.
-
C.
Gorg Blau reservoir
Gorg Blau reservoir is an artificial mountain lake in Mallorca, Spain, serving as a key freshwater supply within the Serra de Tramuntana range.
-
D.
Ruza Reservoir
Ruza Reservoir is a large artificial lake in the Moscow region of Russia, created by damming the Ruza River to serve as a key source of water supply and recreation.
-
E.
Koka Reservoir
Koka Reservoir is a major artificial lake in Ethiopia formed by the Koka Dam on the Awash River, serving as an important source of hydroelectric power, irrigation, and fisheries.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| basinCountry | Bulgaria NERFINISHED ⓘ |
| completedIn | 1950s ⓘ |
| constructionBegan | 1940s ⓘ |
| country | Bulgaria ⓘ |
| hasActivity |
boating
ⓘ
camping ⓘ fishing ⓘ swimming ⓘ |
| hasDamType | concrete dam ⓘ |
| hasEnvironmentalConcern |
eutrophication risk
ⓘ
water pollution risk ⓘ |
| hasNearbyInfrastructure |
hydropower facilities
ⓘ
water treatment plants ⓘ |
| hasRecreationalUse | weekend tourism from Sofia ⓘ |
| hasTransportAccess | road from Sofia to Samokov ⓘ |
| inflow | Iskar River NERFINISHED ⓘ |
| isImportantFor |
local tourism industry
ⓘ
regional agriculture ⓘ regional water security ⓘ |
| isLargestReservoirNear | Sofia NERFINISHED ⓘ |
| isMajorSourceOf | potable water for Sofia ⓘ |
| locatedIn |
Sofia Province
NERFINISHED
ⓘ
western Bulgaria ⓘ |
| locatedInMountainRange | Rila Mountains foothills ⓘ |
| locatedInProtectedArea | Iskar Reservoir protected zone ⓘ |
| locatedNear | Sofia NERFINISHED ⓘ |
| nearSettlement |
Kokalyane
NERFINISHED
ⓘ
Pancharevo NERFINISHED ⓘ Pasarel NERFINISHED ⓘ |
| onRiver | Iskar River NERFINISHED ⓘ |
| operator | Sofiyska Voda NERFINISHED ⓘ |
| outflow | Iskar River NERFINISHED ⓘ |
| partOf | Iskar River basin NERFINISHED ⓘ |
| purpose |
drinking water supply
ⓘ
irrigation ⓘ recreation ⓘ |
| serves | Sofia region NERFINISHED ⓘ |
| usedFor |
fisheries
ⓘ
flood control ⓘ hydroelectric power generation ⓘ tourism ⓘ |
| waterSupplyFor | Sofia 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: Iskar Reservoir Description of subject: Iskar Reservoir is a large artificial lake in western Bulgaria that serves as a major source of drinking water, irrigation, and recreation for the Sofia region.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.