Taf Fechan
E187536
Taf Fechan is a tributary river in South Wales that rises in the Brecon Beacons and flows south to join the Taf Fawr, together forming the River Taff.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Taf Fechan canonical | 4 |
| Taff Fechan | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1644454 — 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: Taf Fechan Context triple: [River Taff, formedByConfluenceOf, Taf Fechan]
-
A.
Taf Fawr
Taf Fawr is one of the principal headwater streams of the River Taff in South Wales, flowing through the Brecon Beacons before joining with other tributaries to form the main river.
-
B.
Penmaen
Penmaen is a small coastal village on the Gower Peninsula in South Wales, known for its scenic cliffs, beaches, and rural surroundings.
-
C.
Traeth Mawr
Traeth Mawr is a large estuarine sand and tidal flat area in Gwynedd, north-west Wales, known for its expansive views and proximity to the village of Penrhyndeudraeth.
-
D.
Plynlimon
Plynlimon is a massif in central Wales known as the mountainous area where several major rivers, including the River Severn, have their headwaters.
-
E.
Dervaig
Dervaig is a small village on the Isle of Mull in Scotland, known for its picturesque setting, distinctive church, and traditional Hebridean character.
- 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: Taf Fechan Target entity description: Taf Fechan is a tributary river in South Wales that rises in the Brecon Beacons and flows south to join the Taf Fawr, together forming the River Taff.
-
A.
Taf Fawr
Taf Fawr is one of the principal headwater streams of the River Taff in South Wales, flowing through the Brecon Beacons before joining with other tributaries to form the main river.
-
B.
Penmaen
Penmaen is a small coastal village on the Gower Peninsula in South Wales, known for its scenic cliffs, beaches, and rural surroundings.
-
C.
Traeth Mawr
Traeth Mawr is a large estuarine sand and tidal flat area in Gwynedd, north-west Wales, known for its expansive views and proximity to the village of Penrhyndeudraeth.
-
D.
Plynlimon
Plynlimon is a massif in central Wales known as the mountainous area where several major rivers, including the River Severn, have their headwaters.
-
E.
Dervaig
Dervaig is a small village on the Isle of Mull in Scotland, known for its picturesque setting, distinctive church, and traditional Hebridean character.
- F. None of above. chosen
Statements (28)
| Predicate | Object |
|---|---|
| instanceOf |
reservoir
ⓘ
river ⓘ tributary ⓘ valley ⓘ |
| basinCountry |
United Kingdom
ⓘ
Wales ⓘ |
| country | Wales ⓘ |
| flowsDirection | south ⓘ |
| flowsThrough |
Brecon Beacons
ⓘ
linked to:
Brecon Beacons in Wales
|
| forms | River Taff ⓘ |
| formsTogetherWith | Taf Fawr ⓘ |
| hasStructure | Taf Fechan Reservoir ⓘ |
| hasUse | water supply ⓘ |
| hasValley | Taf Fechan valley ⓘ |
| languageOfName | Welsh ⓘ |
| locatedIn |
Brecon Beacons
ⓘ
linked to:
Brecon Beacons in Wales
Brecon Beacons National Park ⓘ
linked to:
Bannau Brycheiniog National Park
Brecon Beacons National Park ⓘ
linked to:
Bannau Brycheiniog National Park
South Wales ⓘ United Kingdom ⓘ |
| locatedOn | Taf Fechan ⓘ |
| mouthOfWaterBody | Taf Fawr ⓘ |
| near | Merthyr Tydfil ⓘ |
| partOf | Taff river system ⓘ |
| region |
Merthyr Tydfil County Borough
ⓘ
linked to:
Merthyr Tydfil
|
| riverSystem | River Taff ⓘ |
| sourceLocation |
Brecon Beacons
ⓘ
linked to:
Brecon Beacons in Wales
|
| tributaryOf | River Taff ⓘ |
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: Taf Fechan Description of subject: Taf Fechan is a tributary river in South Wales that rises in the Brecon Beacons and flows south to join the Taf Fawr, together forming the River Taff.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.