Sarn Gynfelyn

E878523

coastal landform reef submerged causeway

Sarn Gynfelyn is a submerged ancient causeway or reef off the coast of Wales, traditionally linked to the legendary drowned kingdom of Cantre'r Gwaelod.

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All labels observed (1)

Label	Occurrences
Sarn Gynfelyn canonical	3

How this entity was disambiguated

This entity first appeared as the object of triple T10271834 — 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: Sarn Gynfelyn
Context triple: [Cantre'r Gwaelod, associatedWithPlace, Sarn Gynfelyn]

A. Tal-y-Cafn
Tal-y-Cafn is a small village in Conwy County Borough, Wales, situated in the Conwy Valley and known for its rural setting and former railway station on the Conwy Valley Line.
B. Llwynywermod
Llwynywermod is a rural Welsh estate that serves as the official residence of the Duke of Cornwall in Wales.
C. Cwmgors
Cwmgors is a small village in Neath Port Talbot, South Wales, known for its coal-mining heritage and close-knit community.
D. Rhoslefain
Rhoslefain is a small rural settlement in Gwynedd, Wales, situated near the coastal town of Tywyn.
E. Blaengwynfi
Blaengwynfi is a small former coal-mining village in South Wales, situated in the Afan Valley and now known for its surrounding forestry and outdoor recreation.
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: Sarn Gynfelyn
Target entity description: Sarn Gynfelyn is a submerged ancient causeway or reef off the coast of Wales, traditionally linked to the legendary drowned kingdom of Cantre'r Gwaelod.

A. Tal-y-Cafn
Tal-y-Cafn is a small village in Conwy County Borough, Wales, situated in the Conwy Valley and known for its rural setting and former railway station on the Conwy Valley Line.
B. Llwynywermod
Llwynywermod is a rural Welsh estate that serves as the official residence of the Duke of Cornwall in Wales.
C. Cwmgors
Cwmgors is a small village in Neath Port Talbot, South Wales, known for its coal-mining heritage and close-knit community.
D. Rhoslefain
Rhoslefain is a small rural settlement in Gwynedd, Wales, situated near the coastal town of Tywyn.
E. Blaengwynfi
Blaengwynfi is a small former coal-mining village in South Wales, situated in the Afan Valley and now known for its surrounding forestry and outdoor recreation.
F. None of above. chosen

Statements (37)

Predicate	Object
instanceOf	coastal landform ⓘ reef ⓘ submerged causeway ⓘ
associatedWith	Welsh folklore ⓘ legend of a drowned kingdom ⓘ
associatedWithLegend	Cantre'r Gwaelod ⓘ linked to: sunken kingdom of Cantre'r Gwaelod
coast	Ceredigion coast ⓘ
composedOf	boulders ⓘ cobbles ⓘ gravel ⓘ
connectedTo	interpretations of post-glacial sea-level rise ⓘ
country	Wales ⓘ
extendsFrom	near Borth ⓘ
extendsInto	Cardigan Bay ⓘ
hasCulturalSignificance	example of folklore linked to coastal features ⓘ
hasEtymology	name derived from Welsh words for causeway or pavement ⓘ
hasGeologicalOrigin	glacial deposit ⓘ moraine ⓘ
hasNameInLanguage	Welsh ⓘ
hasStatus	natural feature ⓘ
hasType	submerged glacial ridge ⓘ
isSubjectOf	local myths about ancient roads ⓘ
languageOfName	Welsh ⓘ
locatedIn	Cardigan Bay ⓘ
locatedNear	Borth ⓘ Ynyslas ⓘ
locatedOffCoastOf	Ceredigion ⓘ
orientation	roughly northwest–southeast ⓘ
partOf	Irish Sea ⓘ series of sarnau in Cardigan Bay ⓘ
region	west Wales ⓘ linked to: West Wales
similarTo	Sarn Badrig ⓘ Sarn y Bwch ⓘ
studiedInDiscipline	coastal geomorphology ⓘ folklore studies ⓘ marine geology ⓘ
visibleAt	low tide ⓘ