River Ystwyth
E239977
River Ystwyth is a river in west Wales that flows through Ceredigion to the coastal town of Aberystwyth, where it meets the sea.
All labels observed (4)
| Label | Occurrences |
|---|---|
| River Ystwyth canonical | 15 |
| River Ystwyth@en | 1 |
| river Ystwyth | 1 |
| the River Ystwyth | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2013091 — 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: River Ystwyth Context triple: [Ceredigion, containsRiver, River Ystwyth]
-
A.
River Dyfi
The River Dyfi is a river in mid Wales that flows from the Cambrian Mountains to Cardigan Bay, forming part of the boundary between the historic counties of Montgomeryshire and Merionethshire.
-
B.
River Dwyryd
River Dwyryd is a river in Gwynedd, Wales, that flows through Snowdonia to reach the estuary near Porthmadog on the west coast.
-
C.
River Gwendraeth
The River Gwendraeth is a river in Carmarthenshire, Wales, known for its twin branches that flow through rural valleys before joining the Burry estuary near the town of Kidwelly.
-
D.
River Rheidol
The River Rheidol is a river in Ceredigion, Wales, known for flowing through steep wooded valleys to the coastal town of Aberystwyth and lending its name to the historic Vale of Rheidol Railway.
-
E.
River Tywi
River Tywi is the longest river entirely in Wales, known for flowing through Carmarthenshire’s rural landscapes before reaching the sea at Carmarthen Bay.
- 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: River Ystwyth Target entity description: River Ystwyth is a river in west Wales that flows through Ceredigion to the coastal town of Aberystwyth, where it meets the sea.
-
A.
River Dyfi
The River Dyfi is a river in mid Wales that flows from the Cambrian Mountains to Cardigan Bay, forming part of the boundary between the historic counties of Montgomeryshire and Merionethshire.
-
B.
River Dwyryd
River Dwyryd is a river in Gwynedd, Wales, that flows through Snowdonia to reach the estuary near Porthmadog on the west coast.
-
C.
River Gwendraeth
The River Gwendraeth is a river in Carmarthenshire, Wales, known for its twin branches that flow through rural valleys before joining the Burry estuary near the town of Kidwelly.
-
D.
River Rheidol
The River Rheidol is a river in Ceredigion, Wales, known for flowing through steep wooded valleys to the coastal town of Aberystwyth and lending its name to the historic Vale of Rheidol Railway.
-
E.
River Tywi
River Tywi is the longest river entirely in Wales, known for flowing through Carmarthenshire’s rural landscapes before reaching the sea at Carmarthen Bay.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| associatedWithCountyTown | Aberystwyth ⓘ |
| associatedWithSettlement | Aberystwyth ⓘ |
| basinCountry |
United Kingdom
ⓘ
Wales ⓘ |
| country | Wales ⓘ |
| drainageBasin | Cardigan Bay drainage basin ⓘ |
| flowsInto |
Cardigan Bay
ⓘ
Irish Sea ⓘ |
| flowsThrough | Ceredigion ⓘ |
| hasEstuary |
Aberystwyth estuary
ⓘ
linked to:
River Rheidol estuary
|
| hasMouthPosition | Aberystwyth seafront ⓘ |
| hasNameInLanguage |
River Ystwyth@en
ⓘ
linked to:
River Ystwyth
Ystwyth@cy ⓘ |
| hasPart | Ystwyth Valley ⓘ |
| languageOfName | Welsh ⓘ |
| locatedIn |
west Wales
ⓘ
linked to:
West Wales
|
| locatedInAdministrativeTerritory |
County of Ceredigion
ⓘ
linked to:
Ceredigion
|
| locatedInCountry | United Kingdom ⓘ |
| locatedOnContinent | Europe ⓘ |
| meetsSeaAt | Aberystwyth ⓘ |
| mouth | Cardigan Bay ⓘ |
| mouthLocatedIn | Aberystwyth ⓘ |
| namedAfter | Aberystwyth ⓘ |
| near | Cambrian Mountains ⓘ |
| partOf | river system of Wales ⓘ |
| region |
Ceredigion
ⓘ
Mid Wales ⓘ |
| watercourseType | coastal 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: River Ystwyth Description of subject: River Ystwyth is a river in west Wales that flows through Ceredigion to the coastal town of Aberystwyth, where it meets the sea.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: River Ystwyth
linked to: River Ystwyth
subject linked to:
River Aeron (indirectly via catchment proximity)
linked to: River Ystwyth