Alva River
E595369
The Alva River is a tributary of the Mondego River in central Portugal, known for its scenic valleys and role in regional hydroelectric power and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Alva River canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T3608848 — 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: Alva River Context triple: [Coimbra District, containsRiver, Alva River]
-
A.
Leona River
The Leona River is a tributary in south-central Texas that flows through several counties, including Uvalde County, before joining the Frio River.
-
B.
Saleph River
The Saleph River, historically located in present-day Turkey, is best known as the site where Holy Roman Emperor Frederick I Barbarossa drowned during the Third Crusade.
-
C.
Wilge River
The Wilge River is a significant river in South Africa that flows through the Free State and Mpumalanga provinces before joining the Vaal River.
-
D.
Savena River
The Savena River is a watercourse in northern Italy that flows through the Emilia-Romagna region and passes near the city of Bologna.
-
E.
Tecka River
The Tecka River is a Patagonian watercourse in Argentina that feeds into the larger Chubut 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: Alva River Target entity description: The Alva River is a tributary of the Mondego River in central Portugal, known for its scenic valleys and role in regional hydroelectric power and recreation.
-
A.
Leona River
The Leona River is a tributary in south-central Texas that flows through several counties, including Uvalde County, before joining the Frio River.
-
B.
Saleph River
The Saleph River, historically located in present-day Turkey, is best known as the site where Holy Roman Emperor Frederick I Barbarossa drowned during the Third Crusade.
-
C.
Wilge River
The Wilge River is a significant river in South Africa that flows through the Free State and Mpumalanga provinces before joining the Vaal River.
-
D.
Savena River
The Savena River is a watercourse in northern Italy that flows through the Emilia-Romagna region and passes near the city of Bologna.
-
E.
Tecka River
The Tecka River is a Patagonian watercourse in Argentina that feeds into the larger Chubut River system.
- F. None of above. chosen
Statements (13)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Portugal ⓘ |
| country | Portugal ⓘ |
| hasFeature | valleys ⓘ |
| knownFor |
recreation
ⓘ
regional hydroelectric power ⓘ scenic valleys ⓘ |
| locatedIn | central Portugal ⓘ |
| mouthLocatedIn | Mondego River ⓘ |
| partOf |
Mondego River basin
ⓘ
linked to:
Mondego River
|
| tributaryOf | Mondego River ⓘ |
| usedFor |
hydroelectric power generation
ⓘ
recreational activities ⓘ |
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: Alva River Description of subject: The Alva River is a tributary of the Mondego River in central Portugal, known for its scenic valleys and role in regional hydroelectric power and recreation.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.