Afon Idwal
E887917
Afon Idwal is a mountain stream in Snowdonia, Wales, that drains the waters of Llyn Idwal and flows through the dramatic Cwm Idwal valley.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Afon Idwal canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10668724 — 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 Idwal Context triple: [Llyn Idwal, hasOutflow, Afon Idwal]
-
A.
Afon Gafr
Afon Gafr is a small mountain stream in Snowdonia, Wales, flowing through the rugged landscape around the Llanberis Pass.
-
B.
Afon Ogwr
Afon Ogwr is a river in South Wales that flows through Bridgend County Borough before reaching the Bristol Channel.
-
C.
Afon Dwyfor
Afon Dwyfor is a river in Gwynedd, Wales, that flows through the village of Llanystumdwy before reaching the sea near Criccieth.
-
D.
Afon Castell
Afon Castell is a small river in Ceredigion, Wales, that feeds into the River Rheidol within the scenic Cambrian Mountains region.
-
E.
Afon Lliw
Afon Lliw is a river in Wales that flows through the countryside of Gwynedd before reaching Llyn Tegid (Bala Lake).
- 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 Idwal Target entity description: Afon Idwal is a mountain stream in Snowdonia, Wales, that drains the waters of Llyn Idwal and flows through the dramatic Cwm Idwal valley.
-
A.
Afon Gafr
Afon Gafr is a small mountain stream in Snowdonia, Wales, flowing through the rugged landscape around the Llanberis Pass.
-
B.
Afon Ogwr
Afon Ogwr is a river in South Wales that flows through Bridgend County Borough before reaching the Bristol Channel.
-
C.
Afon Dwyfor
Afon Dwyfor is a river in Gwynedd, Wales, that flows through the village of Llanystumdwy before reaching the sea near Criccieth.
-
D.
Afon Castell
Afon Castell is a small river in Ceredigion, Wales, that feeds into the River Rheidol within the scenic Cambrian Mountains region.
-
E.
Afon Lliw
Afon Lliw is a river in Wales that flows through the countryside of Gwynedd before reaching Llyn Tegid (Bala Lake).
- F. None of above. chosen
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf | mountain stream ⓘ |
| country | Wales ⓘ |
| drainageBasin | River Ogwen catchment ⓘ |
| drains | Llyn Idwal ⓘ |
| elevationCategory | upland stream ⓘ |
| flowsThrough | Cwm Idwal ⓘ |
| hasFeature |
rocky stream bed
ⓘ
waterfalls ⓘ |
| hasNameElement |
Afon
ⓘ
Idwal ⓘ |
| languageOfName | Welsh ⓘ |
| locatedIn |
Gwynedd
ⓘ
Snowdonia ⓘ north-west Wales ⓘ |
| nameMeaning | Idwal River ⓘ |
| near |
Glyderau mountain range
ⓘ
Llyn Ogwen ⓘ |
| partOf | Ogwen Valley hydrological system ⓘ |
| protectedArea |
Cwm Idwal National Nature Reserve
ⓘ
linked to:
National Nature Reserve (Cwm Idwal)
|
| region | Eryri National Park ⓘ |
| sourceLake | Llyn Idwal ⓘ |
| usedFor |
hiking scenery
ⓘ
landscape photography ⓘ |
| valley | Cwm Idwal ⓘ |
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 Idwal Description of subject: Afon Idwal is a mountain stream in Snowdonia, Wales, that drains the waters of Llyn Idwal and flows through the dramatic Cwm Idwal valley.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.