Afon Glaslyn
E332326
Afon Glaslyn is a river in north-west Wales that flows from the mountains of Snowdonia to the sea at Tremadog Bay.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Afon Glaslyn canonical | 19 |
| Afon Glaslyn (nearby) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2543002 — 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 Glaslyn Context triple: [Porthmadog, hasNearbyRiver, Afon Glaslyn]
-
A.
Afon Lliw
Afon Lliw is a river in Wales that flows through the countryside of Gwynedd before reaching Llyn Tegid (Bala Lake).
-
B.
Afon Wnion
Afon Wnion is a river in Gwynedd, northwest Wales, that flows through the Dolgellau area before joining the River Mawddach.
-
C.
Dyffryn Ogwen
Dyffryn Ogwen is a scenic valley in north-west Wales known for its dramatic mountain landscapes, rivers, and walking routes within the Snowdonia region.
-
D.
Afon Llwyd
Afon Llwyd is a river in southeast Wales that flows through Torfaen, including the town of Cwmbran, before joining the River Usk.
-
E.
Afon Fathew
Afon Fathew is a small river in Gwynedd, Wales, whose scenic valley is closely associated with and followed by the historic Talyllyn narrow-gauge railway.
- 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 Glaslyn Target entity description: Afon Glaslyn is a river in north-west Wales that flows from the mountains of Snowdonia to the sea at Tremadog Bay.
-
A.
Afon Lliw
Afon Lliw is a river in Wales that flows through the countryside of Gwynedd before reaching Llyn Tegid (Bala Lake).
-
B.
Afon Wnion
Afon Wnion is a river in Gwynedd, northwest Wales, that flows through the Dolgellau area before joining the River Mawddach.
-
C.
Dyffryn Ogwen
Dyffryn Ogwen is a scenic valley in north-west Wales known for its dramatic mountain landscapes, rivers, and walking routes within the Snowdonia region.
-
D.
Afon Llwyd
Afon Llwyd is a river in southeast Wales that flows through Torfaen, including the town of Cwmbran, before joining the River Usk.
-
E.
Afon Fathew
Afon Fathew is a small river in Gwynedd, Wales, whose scenic valley is closely associated with and followed by the historic Talyllyn narrow-gauge railway.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| associatedWith |
Ffestiniog Railway
ⓘ
Welsh Highland Railway ⓘ |
| country | Wales ⓘ |
| crossesFeature | Aberglaslyn Gorge ⓘ |
| emptiesInto | Cardigan Bay ⓘ |
| flowsDirection | generally south-west ⓘ |
| flowsThrough |
Aberglaslyn Pass
ⓘ
Beddgelert ⓘ Porthmadog ⓘ |
| formsFeature |
Glaslyn Estuary
ⓘ
linked to:
Glaslyn estuary
|
| hasTributary |
Afon Colwyn
ⓘ
linked to:
River Colwyn
Afon Nanmor ⓘ |
| languageOfName | Welsh ⓘ |
| locatedIn | north-west Wales ⓘ |
| locatedOnContinent | Europe ⓘ |
| mouth |
Tremadog Bay
ⓘ
linked to:
Caernarfon Bay
|
| nameMeaning | blue lake river ⓘ |
| nearbySettlement |
Prenteg
ⓘ
Tremadog ⓘ |
| partOf | Gwynedd ⓘ |
| region |
Snowdonia National Park
ⓘ
linked to:
Eryri National Park
|
| sourceLocation | Glaslyn (cirque lake on Snowdon) ⓘ |
| sourceMountain | Snowdon ⓘ |
| sourceRegion | Snowdonia ⓘ |
| usedFor |
canoeing
ⓘ
fishing ⓘ recreation ⓘ |
| watercourseType | mountain river ⓘ |
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 Glaslyn Description of subject: Afon Glaslyn is a river in north-west Wales that flows from the mountains of Snowdonia to the sea at Tremadog Bay.
Referenced by (20)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Afon Glaslyn