Kallanai (Grand Anicut)
E326573
Kallanai (Grand Anicut) is an ancient stone dam built across the Kaveri River in Tamil Nadu, India, and is one of the oldest water-regulation structures still in use.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Grand Anicut | 1 |
| Kallanai (Grand Anicut) canonical | 1 |
| Lower Anicut | 1 |
| Upper Anicut | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3111522 — 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: Kallanai (Grand Anicut) Context triple: [Tiruchirappalli, hasLandmark, Kallanai (Grand Anicut)]
-
A.
Kosi Barrage
Kosi Barrage is a major flood-control and irrigation structure built across the Kosi River near the India–Nepal border.
-
B.
Prakasam Barrage
Prakasam Barrage is a major masonry dam and road bridge in Vijayawada, Andhra Pradesh, that regulates the Krishna River and supports irrigation and water supply for the surrounding region.
-
C.
Kota Barrage
Kota Barrage is a major irrigation and water-regulation dam located near Kota in Rajasthan, India, built across the Chambal River.
-
D.
Tajewala Barrage
Tajewala Barrage was an older irrigation and water diversion structure on the Yamuna River in Haryana, India, that was eventually superseded by the modern Hathni Kund Barrage.
-
E.
Mettur Dam
Mettur Dam is a major masonry dam in Tamil Nadu, India, built across the Kaveri River and known for its large reservoir and role in irrigation and power generation.
- 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: Kallanai (Grand Anicut) Target entity description: Kallanai (Grand Anicut) is an ancient stone dam built across the Kaveri River in Tamil Nadu, India, and is one of the oldest water-regulation structures still in use.
-
A.
Kosi Barrage
Kosi Barrage is a major flood-control and irrigation structure built across the Kosi River near the India–Nepal border.
-
B.
Prakasam Barrage
Prakasam Barrage is a major masonry dam and road bridge in Vijayawada, Andhra Pradesh, that regulates the Krishna River and supports irrigation and water supply for the surrounding region.
-
C.
Kota Barrage
Kota Barrage is a major irrigation and water-regulation dam located near Kota in Rajasthan, India, built across the Chambal River.
-
D.
Tajewala Barrage
Tajewala Barrage was an older irrigation and water diversion structure on the Yamuna River in Haryana, India, that was eventually superseded by the modern Hathni Kund Barrage.
-
E.
Mettur Dam
Mettur Dam is a major masonry dam in Tamil Nadu, India, built across the Kaveri River and known for its large reservoir and role in irrigation and power generation.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
ancient dam
ⓘ
heritage structure ⓘ stone masonry dam ⓘ tourist attraction ⓘ water-regulation structure ⓘ |
| builtBy | Karikala Chola ⓘ |
| builtByDynasty |
Chola dynasty
ⓘ
surface form:
Early Chola dynasty
|
| constructedFromMaterial |
stone
ⓘ
unhewn stone ⓘ |
| constructionStartCentury | 2nd century CE ⓘ |
| continent | Asia ⓘ |
| country | India ⓘ |
| crosses |
Kaveri
ⓘ
surface form:
Kaveri River
|
| culturalSignificance |
important monument of Chola engineering
ⓘ
symbol of traditional water management in Tamil Nadu ⓘ |
| designType |
barrage
ⓘ
diversion weir ⓘ |
| estimatedConstructionPeriod | c. 2nd century CE ⓘ |
| governingBody | Government of Tamil Nadu ⓘ |
| hasAlias |
Kallanai (Grand Anicut)
self-linksurface differs
ⓘ
surface form:
Grand Anicut
Kallanai Dam ⓘ |
| hasNearbyStructure |
Kallanai (Grand Anicut)
self-linksurface differs
ⓘ
surface form:
Lower Anicut
Kallanai (Grand Anicut) self-linksurface differs ⓘ
surface form:
Upper Anicut
|
| height | about 20 feet ⓘ |
| heritageStatus | one of the oldest water-regulation structures still in use ⓘ |
| irrigatesRegion |
Cauvery Delta farmlands
ⓘ
Kaveri River Delta ⓘ
surface form:
Thanjavur delta
|
| length |
about 1,080 feet
ⓘ
about 329 metres ⓘ |
| locatedIn | Tamil Nadu ⓘ |
| locatedInDistrict | Tiruchirappalli district ⓘ |
| locatedInRegion |
Kaveri River Delta
ⓘ
surface form:
Cauvery Delta
|
| locatedNear |
Tanjore
ⓘ
surface form:
Thanjavur
Tiruchirappalli ⓘ |
| locatedOnRiver |
Kaveri
ⓘ
surface form:
Kaveri River
|
| maintainedBy |
Tamil Nadu Public Works Department
ⓘ
surface form:
Public Works Department of Tamil Nadu
|
| managesWaterFor | Cauvery Delta irrigation system ⓘ |
| notableFor |
ancient hydraulic engineering
ⓘ
influence on later dam design in South India ⓘ longevity of operation ⓘ |
| purpose |
flood control
ⓘ
irrigation ⓘ water regulation ⓘ |
| stillInUse | true ⓘ |
| usedFor |
agricultural irrigation
ⓘ
diversion of river water ⓘ |
| width | about 60 feet ⓘ |
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: Kallanai (Grand Anicut) Description of subject: Kallanai (Grand Anicut) is an ancient stone dam built across the Kaveri River in Tamil Nadu, India, and is one of the oldest water-regulation structures still in use.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Kallanai
this entity surface form:
Grand Anicut
subject surface form:
Kallanai
this entity surface form:
Upper Anicut
subject surface form:
Kallanai
this entity surface form:
Lower Anicut