Porthmadog Cob
E855809
Porthmadog Cob is a historic sea wall and causeway in Gwynedd, Wales, that carries road and rail links across the Glaslyn estuary and played a key role in the development of the town of Porthmadog.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Porthmadog Cob canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10313903 — 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: Porthmadog Cob Context triple: [Glaslyn estuary, hasTransportationInfrastructureNearby, Porthmadog Cob]
-
A.
Taff-Ely
Taff-Ely was a former local government district in Mid Glamorgan, Wales, centered on the valleys of the River Taff and River Ely and including towns such as Pontypridd.
-
B.
Eriskay ponies
Eriskay ponies are a rare, hardy native Scottish pony breed from the Hebridean island of Eriskay, valued for their sure-footedness, gentle temperament, and historical use in crofting and transport.
-
C.
Cleveland Bay
Cleveland Bay is a coastal bay on the northeastern shore of Queensland, Australia, forming part of the Coral Sea near the city of Townsville.
-
D.
Swansea Jack
Swansea Jack is the traditional nickname and demonym for a person from the city of Swansea in Wales.
-
E.
Llionés
Llionés is the native name for the Leonese language, a Romance language spoken in parts of northwestern Spain.
- 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: Porthmadog Cob Target entity description: Porthmadog Cob is a historic sea wall and causeway in Gwynedd, Wales, that carries road and rail links across the Glaslyn estuary and played a key role in the development of the town of Porthmadog.
-
A.
Taff-Ely
Taff-Ely was a former local government district in Mid Glamorgan, Wales, centered on the valleys of the River Taff and River Ely and including towns such as Pontypridd.
-
B.
Eriskay ponies
Eriskay ponies are a rare, hardy native Scottish pony breed from the Hebridean island of Eriskay, valued for their sure-footedness, gentle temperament, and historical use in crofting and transport.
-
C.
Cleveland Bay
Cleveland Bay is a coastal bay on the northeastern shore of Queensland, Australia, forming part of the Coral Sea near the city of Townsville.
-
D.
Swansea Jack
Swansea Jack is the traditional nickname and demonym for a person from the city of Swansea in Wales.
-
E.
Llionés
Llionés is the native name for the Leonese language, a Romance language spoken in parts of northwestern Spain.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
causeway
ⓘ
sea wall ⓘ |
| carries |
railway
ⓘ
road ⓘ |
| connects |
Porthmadog
ⓘ
land on opposite side of Glaslyn estuary ⓘ |
| country | Wales ⓘ |
| crosses | Glaslyn estuary ⓘ |
| hasFunction |
flood defence
ⓘ
land reclamation ⓘ transport link ⓘ |
| hasNameInLanguage |
Cob Porthmadog
ⓘ
The Cob ⓘ |
| hasNearby |
Ffestiniog Railway Harbour Station
ⓘ
linked to:
Porthmadog Harbour Station
Porthmadog Harbour ⓘ
linked to:
Porthmadog harbour
|
| heritageStatus | historic structure ⓘ |
| languageOfName | Welsh ⓘ |
| locatedIn |
Gwynedd
ⓘ
north-west Wales ⓘ |
| locatedNear | Porthmadog ⓘ |
| locatedOn | Glaslyn ⓘ |
| partOf |
A487 road
NERFINISHED
ⓘ
transport infrastructure of Gwynedd ⓘ |
| region |
Snowdonia area
ⓘ
linked to:
Snowdonia
|
| significantFor | development of Porthmadog ⓘ |
| usedBy |
Ffestiniog Railway
ⓘ
rail traffic ⓘ road traffic ⓘ |
| usedFor |
access to Ffestiniog Railway
ⓘ
access to Porthmadog ⓘ |
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: Porthmadog Cob Description of subject: Porthmadog Cob is a historic sea wall and causeway in Gwynedd, Wales, that carries road and rail links across the Glaslyn estuary and played a key role in the development of the town of Porthmadog.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.