River Elan
E821317
River Elan is a river in mid Wales that flows through the Elan Valley, known for its series of reservoirs and dams supplying water to Birmingham.
All labels observed (1)
| Label | Occurrences |
|---|---|
| River Elan canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T9769103 — 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: River Elan Context triple: [Garreg Ddu Reservoir, river, River Elan]
-
A.
River Alwin
River Alwin is a small river in Northumberland, England, known for flowing through the Cheviot Hills before joining the River Coquet.
-
B.
River Euchan
River Euchan is a small Scottish river that flows through Dumfries and Galloway, known for its scenic glen and popularity for walking and angling.
-
C.
River Ellen
River Ellen is a small river in Cumbria, England, that flows through the Solway Plain before joining the River Derwent.
-
D.
Darro River
The Darro River is a small Andalusian river that flows through the historic center of Granada, Spain, running alongside the Alhambra and contributing to the city's distinctive landscape.
-
E.
River Mein
River Mein is a small river in Dumfries and Galloway in southwest Scotland, flowing near the village of Ecclefechan.
- 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: River Elan Target entity description: River Elan is a river in mid Wales that flows through the Elan Valley, known for its series of reservoirs and dams supplying water to Birmingham.
-
A.
River Alwin
River Alwin is a small river in Northumberland, England, known for flowing through the Cheviot Hills before joining the River Coquet.
-
B.
River Euchan
River Euchan is a small Scottish river that flows through Dumfries and Galloway, known for its scenic glen and popularity for walking and angling.
-
C.
River Ellen
River Ellen is a small river in Cumbria, England, that flows through the Solway Plain before joining the River Derwent.
-
D.
Darro River
The Darro River is a small Andalusian river that flows through the historic center of Granada, Spain, running alongside the Alhambra and contributing to the city's distinctive landscape.
-
E.
River Mein
River Mein is a small river in Dumfries and Galloway in southwest Scotland, flowing near the village of Ecclefechan.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| associatedWith |
Elan Valley dams
NERFINISHED
ⓘ
Victorian engineering works ⓘ |
| basinCountry |
United Kingdom
ⓘ
Wales NERFINISHED ⓘ |
| confluenceLocation | near Rhayader ⓘ |
| country | Wales ⓘ |
| flowsInto | River Wye NERFINISHED ⓘ |
| flowsThrough | Elan Valley NERFINISHED ⓘ |
| formsReservoir |
Caban-coch Reservoir
NERFINISHED
ⓘ
Craig Goch Reservoir NERFINISHED ⓘ Garreg-ddu Reservoir NERFINISHED ⓘ Pen-y-garreg Reservoir NERFINISHED ⓘ |
| hasRightTributary | River Claerwen NERFINISHED ⓘ |
| hasTributary | Nant y Gro NERFINISHED ⓘ |
| impoundedBy |
Caban-coch Dam
NERFINISHED
ⓘ
Craig Goch Dam NERFINISHED ⓘ Garreg-ddu Dam NERFINISHED ⓘ Pen-y-garreg Dam NERFINISHED ⓘ |
| knownFor |
Elan Valley reservoirs
NERFINISHED
ⓘ
series of dams ⓘ supplying water to Birmingham ⓘ |
| locatedIn | Mid Wales NERFINISHED ⓘ |
| locatedInProtectedArea | Elan Valley Estate NERFINISHED ⓘ |
| nearbyTown | Rhayader NERFINISHED ⓘ |
| partOfWaterSupplyScheme | Birmingham water supply system NERFINISHED ⓘ |
| region | Elenydd NERFINISHED ⓘ |
| sourceLocation | Cambrian Mountains NERFINISHED ⓘ |
| tributaryOf | River Wye NERFINISHED ⓘ |
| usedFor |
angling
ⓘ
drinking water supply ⓘ recreation ⓘ |
| valleyNameDerivedFrom | Elan Valley NERFINISHED ⓘ |
| watercourseRegion | Powys 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: River Elan Description of subject: River Elan is a river in mid Wales that flows through the Elan Valley, known for its series of reservoirs and dams supplying water to Birmingham.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.