Oyan River
E1023478
The Oyan River is a significant waterway in southwestern Nigeria that feeds into the Ogun River and supports regional water supply, agriculture, and the Oyan Dam reservoir.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Oyan River canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T12711925 — 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: Oyan River Context triple: [Ogun River, hasTributary, Oyan River]
-
A.
Bani River
The Bani River is a significant West African waterway that joins the Niger River in Mali, contributing substantially to its flow and regional agriculture.
-
B.
Jullab River
The Jullab River is a minor watercourse in northern Mesopotamia that serves as a tributary of the Balikh River in present-day Syria.
-
C.
Tariku River
The Tariku River is a major tributary in Papua, Indonesia, that joins with another river to form the large Mamberamo River system.
-
D.
Awali River
The Awali River is a significant watercourse in Lebanon that flows through the region of Sidon before emptying into the Mediterranean Sea.
-
E.
Yula River
The Yula River is a waterway in northern Russia that forms part of the drainage basin feeding into the Northern Dvina River system.
- 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: Oyan River Target entity description: The Oyan River is a significant waterway in southwestern Nigeria that feeds into the Ogun River and supports regional water supply, agriculture, and the Oyan Dam reservoir.
-
A.
Bani River
The Bani River is a significant West African waterway that joins the Niger River in Mali, contributing substantially to its flow and regional agriculture.
-
B.
Jullab River
The Jullab River is a minor watercourse in northern Mesopotamia that serves as a tributary of the Balikh River in present-day Syria.
-
C.
Tariku River
The Tariku River is a major tributary in Papua, Indonesia, that joins with another river to form the large Mamberamo River system.
-
D.
Awali River
The Awali River is a significant watercourse in Lebanon that flows through the region of Sidon before emptying into the Mediterranean Sea.
-
E.
Yula River
The Yula River is a waterway in northern Russia that forms part of the drainage basin feeding into the Northern Dvina River system.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Nigeria ⓘ |
| continent | Africa ⓘ |
| country | Nigeria ⓘ |
| drainageBasin |
Guinea forest–savanna mosaic ecoregion
ⓘ
linked to:
Guinean forest–savanna mosaic
|
| flowsInto | Ogun River ⓘ |
| formsReservoir |
Oyan Dam reservoir
ⓘ
linked to:
Oyan Reservoir
|
| hasEconomicImportance |
regional agriculture
ⓘ
urban water supply ⓘ |
| hasHydrologicalRole | regulates flow of Ogun River ⓘ |
| hasStructure |
Oyan Dam
ⓘ
linked to:
Oyan River Dam
|
| hasUse | hydropower potential at Oyan Dam ⓘ |
| impoundedBy |
Oyan Dam
ⓘ
linked to:
Oyan River Dam
|
| isTributaryOf | Ogun River ⓘ |
| languageOfToponym | Yoruba ⓘ |
| locatedIn |
Southwestern Nigeria
ⓘ
linked to:
Western Nigeria
Yorubaland ⓘ |
| partOf | Ogun River basin ⓘ |
| region |
Lagos State
ⓘ
Ogun State ⓘ |
| supports |
Oyan Dam reservoir
ⓘ
linked to:
Oyan Reservoir
domestic water supply ⓘ industrial water supply ⓘ livestock watering ⓘ |
| usedFor |
agriculture
ⓘ
fishing ⓘ irrigation ⓘ water supply ⓘ |
| waterSourceFor |
Abeokuta region
ⓘ
linked to:
Abeokuta
Lagos metropolitan area (via system including Oyan Dam) ⓘ |
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: Oyan River Description of subject: The Oyan River is a significant waterway in southwestern Nigeria that feeds into the Ogun River and supports regional water supply, agriculture, and the Oyan Dam reservoir.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.