Parakrama Samudra (Parakrama Samudraya) reservoir
E567631
Parakrama Samudra (Parakrama Samudraya) is a vast ancient irrigation reservoir in Sri Lanka, renowned as a masterpiece of hydraulic engineering built during the reign of King Parakramabahu I.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Parakrama Samudra | 4 |
| Parakrama Samudra (Parakrama Samudraya) reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6078082 — 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: Parakrama Samudra (Parakrama Samudraya) reservoir Context triple: [Ancient City of Polonnaruwa, hasStructure, Parakrama Samudra (Parakrama Samudraya) reservoir]
-
A.
Randenigala Dam
Randenigala Dam is a major hydroelectric and irrigation dam in Sri Lanka, forming part of the Mahaweli Development Programme and creating the Randenigala Reservoir.
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B.
Kandy Lake
Kandy Lake is an artificial lake in the heart of Kandy, Sri Lanka, known for its scenic setting amid the city’s historic and religious landmarks.
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C.
Maduru Oya
Maduru Oya is a major river in Sri Lanka known for its irrigation reservoir and surrounding national park rich in wildlife and dry-zone ecosystems.
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D.
Polgolla Dam
Polgolla Dam is a key diversion dam in Sri Lanka that channels water from the Mahaweli River for irrigation, hydropower generation, and regional water management.
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E.
Jaffna Lagoon
Jaffna Lagoon is a large coastal lagoon in northern Sri Lanka known for its rich biodiversity, fishing grounds, and importance to the local Jaffna Peninsula communities.
- 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: Parakrama Samudra (Parakrama Samudraya) reservoir Target entity description: Parakrama Samudra (Parakrama Samudraya) is a vast ancient irrigation reservoir in Sri Lanka, renowned as a masterpiece of hydraulic engineering built during the reign of King Parakramabahu I.
-
A.
Randenigala Dam
Randenigala Dam is a major hydroelectric and irrigation dam in Sri Lanka, forming part of the Mahaweli Development Programme and creating the Randenigala Reservoir.
-
B.
Kandy Lake
Kandy Lake is an artificial lake in the heart of Kandy, Sri Lanka, known for its scenic setting amid the city’s historic and religious landmarks.
-
C.
Maduru Oya
Maduru Oya is a major river in Sri Lanka known for its irrigation reservoir and surrounding national park rich in wildlife and dry-zone ecosystems.
-
D.
Polgolla Dam
Polgolla Dam is a key diversion dam in Sri Lanka that channels water from the Mahaweli River for irrigation, hydropower generation, and regional water management.
-
E.
Jaffna Lagoon
Jaffna Lagoon is a large coastal lagoon in northern Sri Lanka known for its rich biodiversity, fishing grounds, and importance to the local Jaffna Peninsula communities.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
ancient reservoir
ⓘ
hydraulic engineering structure ⓘ irrigation reservoir ⓘ |
| alsoKnownAs |
Parakrama Samudraya
NERFINISHED
ⓘ
Sea of Parakrama NERFINISHED ⓘ |
| associatedWith |
Polonnaruwa Kingdom
NERFINISHED
ⓘ
ancient Sri Lankan irrigation technology ⓘ |
| builder | King Parakramabahu I NERFINISHED ⓘ |
| constructionPeriod | reign of Parakramabahu I ⓘ |
| country | Sri Lanka ⓘ |
| culturalSignificance |
important landmark in Polonnaruwa
ⓘ
symbol of ancient Sri Lankan hydraulic civilization ⓘ |
| currentUse |
hydraulic research and study site
ⓘ
modern irrigation ⓘ |
| engineeringType | gravity-fed reservoir ⓘ |
| hasFeature |
ancient sluice structures
ⓘ
long embankment ⓘ multiple interconnected basins ⓘ |
| hasPart |
canal network
ⓘ
earthen bund ⓘ sluice gates ⓘ spillways ⓘ |
| heritageStatus | part of UNESCO World Heritage Site Ancient City of Polonnaruwa ⓘ |
| locatedIn |
North Central Province, Sri Lanka
NERFINISHED
ⓘ
Polonnaruwa NERFINISHED ⓘ Polonnaruwa District NERFINISHED ⓘ ancient city of Polonnaruwa NERFINISHED ⓘ |
| locatedOn | Mahaweli river basin NERFINISHED ⓘ |
| managedBy | Sri Lankan irrigation authorities ⓘ |
| material |
earth
ⓘ
stone ⓘ |
| namedAfter | Parakramabahu I NERFINISHED ⓘ |
| near | Polonnaruwa archaeological ruins NERFINISHED ⓘ |
| partOf | ancient irrigation system of Sri Lanka ⓘ |
| purpose |
agricultural support
ⓘ
irrigation ⓘ water storage ⓘ |
| recognizedAs | masterpiece of hydraulic engineering ⓘ |
| region | Dry Zone of Sri Lanka ⓘ |
| tourismType |
eco-tourism attraction
ⓘ
heritage tourism site ⓘ |
| usedFor |
domestic water supply
ⓘ
fisheries ⓘ paddy cultivation ⓘ tourism ⓘ |
| waterSource |
Amban Ganga
NERFINISHED
ⓘ
rainwater ⓘ |
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: Parakrama Samudra (Parakrama Samudraya) reservoir Description of subject: Parakrama Samudra (Parakrama Samudraya) is a vast ancient irrigation reservoir in Sri Lanka, renowned as a masterpiece of hydraulic engineering built during the reign of King Parakramabahu I.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Parakrama Samudra
this entity surface form:
Parakrama Samudra
North Central Province, Sri Lanka
→
containsArchaeologicalSite
→
Parakrama Samudra (Parakrama Samudraya) reservoir
ⓘ
this entity surface form:
Parakrama Samudra
North Central Province, Sri Lanka
→
containsReservoir
→
Parakrama Samudra (Parakrama Samudraya) reservoir
ⓘ
this entity surface form:
Parakrama Samudra