Afon Cefni
E788225
Afon Cefni is a river on the island of Anglesey in Wales that flows through the town of Llangefni before reaching the sea near Malltraeth.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Afon Cefni canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T9262245 — 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: Afon Cefni Context triple: [Llangefni, hasRiver, Afon Cefni]
-
A.
Afon Taf
Afon Taf is a river in southwest Wales that flows through Carmarthenshire before reaching the sea at Carmarthen Bay.
-
B.
Afon Crawnon
Afon Crawnon is a small river in Powys, Wales, that flows through the Brecon Beacons to join the River Usk.
-
C.
Afon Llech
Afon Llech is a small river in South Wales that flows through the Brecon Beacons area as a tributary of the River Tawe, known for its scenic wooded valleys and waterfalls.
-
D.
Afon Tawe
Afon Tawe is a river in South Wales that flows from the Brecon Beacons through the Swansea Valley to the city of Swansea and into Swansea Bay.
-
E.
Afon Wnion
Afon Wnion is a river in Gwynedd, northwest Wales, that flows through the Dolgellau area before joining the River Mawddach.
- 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: Afon Cefni Target entity description: Afon Cefni is a river on the island of Anglesey in Wales that flows through the town of Llangefni before reaching the sea near Malltraeth.
-
A.
Afon Taf
Afon Taf is a river in southwest Wales that flows through Carmarthenshire before reaching the sea at Carmarthen Bay.
-
B.
Afon Crawnon
Afon Crawnon is a small river in Powys, Wales, that flows through the Brecon Beacons to join the River Usk.
-
C.
Afon Llech
Afon Llech is a small river in South Wales that flows through the Brecon Beacons area as a tributary of the River Tawe, known for its scenic wooded valleys and waterfalls.
-
D.
Afon Tawe
Afon Tawe is a river in South Wales that flows from the Brecon Beacons through the Swansea Valley to the city of Swansea and into Swansea Bay.
-
E.
Afon Wnion
Afon Wnion is a river in Gwynedd, northwest Wales, that flows through the Dolgellau area before joining the River Mawddach.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | United Kingdom ⓘ |
| country | Wales ⓘ |
| crosses |
Llangefni
ⓘ
Malltraeth Marsh ⓘ |
| drainageBasin | Anglesey ⓘ |
| flowsInto | Irish Sea ⓘ |
| flowsThrough |
Cefni Reservoir
ⓘ
Llangefni ⓘ |
| hasBridge | Llangefni bridge ⓘ |
| hasNearbyProtectedArea |
Cors Ddyga
ⓘ
Cors Malltraeth National Nature Reserve ⓘ |
| hasNearbySettlement |
Llangefni
ⓘ
Malltraeth ⓘ |
| hasPart | Cefni Reservoir ⓘ |
| hasWetlandArea |
Cors Malltraeth
ⓘ
Malltraeth Marsh ⓘ |
| island | Anglesey ⓘ |
| languageOfName | Welsh ⓘ |
| locatedIn |
Anglesey
ⓘ
Isle of Anglesey ⓘ
linked to:
Anglesey
north-west Wales ⓘ |
| locatedInAdministrativeTerritory |
Isle of Anglesey County
ⓘ
linked to:
Anglesey
|
| mouthLocation |
Malltraeth
ⓘ
Malltraeth Bay ⓘ
linked to:
Trearddur Bay
Malltraeth Sands ⓘ |
| passesThrough | Malltraeth Marsh ⓘ |
| region |
Gwynedd (historic county)
ⓘ
linked to:
Gwynedd
|
| sourceLocation | near Capel Coch ⓘ |
| tributaryOf | Irish Sea ⓘ |
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: Afon Cefni Description of subject: Afon Cefni is a river on the island of Anglesey in Wales that flows through the town of Llangefni before reaching the sea near Malltraeth.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.