Tryweryn flooding
E900771
Tryweryn flooding refers to the controversial 1960s inundation of the Welsh village of Capel Celyn to create a reservoir for supplying water to Liverpool, which became a powerful symbol of Welsh nationalism and political protest.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Tryweryn Valley flooding | 1 |
| Tryweryn flooding canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11038673 — 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: Tryweryn flooding Context triple: [Llyn Celyn, associatedWithEvent, Tryweryn flooding]
-
A.
Aberdulais Falls
Aberdulais Falls is a scenic waterfall in South Wales known for its historic industrial heritage site and picturesque natural surroundings.
-
B.
Cenarth Falls
Cenarth Falls is a picturesque series of waterfalls and rapids on the River Teifi in west Wales, renowned for its natural beauty, salmon leap, and traditional coracle fishing.
-
C.
Glyder Fawr
Glyder Fawr is a prominent mountain in Snowdonia, Wales, known for its rugged rocky summit and status as one of the country’s highest peaks.
-
D.
Middleham Falls
Middleham Falls is a tall, scenic waterfall nestled in the rainforest of Dominica, popular with hikers for its lush surroundings and natural pool.
-
E.
Plynlimon
Plynlimon is a massif in central Wales known as the mountainous area where several major rivers, including the River Severn, have their headwaters.
- 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: Tryweryn flooding Target entity description: Tryweryn flooding refers to the controversial 1960s inundation of the Welsh village of Capel Celyn to create a reservoir for supplying water to Liverpool, which became a powerful symbol of Welsh nationalism and political protest.
-
A.
Aberdulais Falls
Aberdulais Falls is a scenic waterfall in South Wales known for its historic industrial heritage site and picturesque natural surroundings.
-
B.
Cenarth Falls
Cenarth Falls is a picturesque series of waterfalls and rapids on the River Teifi in west Wales, renowned for its natural beauty, salmon leap, and traditional coracle fishing.
-
C.
Glyder Fawr
Glyder Fawr is a prominent mountain in Snowdonia, Wales, known for its rugged rocky summit and status as one of the country’s highest peaks.
-
D.
Middleham Falls
Middleham Falls is a tall, scenic waterfall nestled in the rainforest of Dominica, popular with hikers for its lush surroundings and natural pool.
-
E.
Plynlimon
Plynlimon is a massif in central Wales known as the mountainous area where several major rivers, including the River Severn, have their headwaters.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
controversy
ⓘ
historical event ⓘ political protest symbol ⓘ |
| cause | construction of a reservoir for Liverpool Corporation ⓘ |
| characterizedBy |
compulsory purchase of land
ⓘ
lack of consent from Welsh local authorities ⓘ opposition from Welsh MPs ⓘ |
| commemoratedBy |
Cofiwch Dryweryn mural
ⓘ
memorials in Wales ⓘ |
| country | Wales ⓘ |
| effect |
campaigns for greater Welsh self-government
ⓘ
demolition of Capel Celyn village ⓘ displacement of Capel Celyn residents ⓘ growth of political protest in Wales ⓘ increased support for Plaid Cymru ⓘ loss of Welsh-speaking rural community ⓘ resentment towards Liverpool authorities in Wales ⓘ strengthening of Welsh nationalism ⓘ |
| endTime | 1965 ⓘ |
| hasAftermath | formal apology by Liverpool City Council in 2005 ⓘ |
| hasSymbol | slogan "Cofiwch Dryweryn" ⓘ |
| languageCommunityAffected | Welsh-speaking community ⓘ |
| legalBasis | Act of Parliament passed at Westminster ⓘ |
| location |
Capel Celyn
ⓘ
Gwynedd ⓘ Tryweryn Valley ⓘ |
| managedBy | Liverpool Corporation ⓘ |
| opposedBy |
Plaid Cymru
ⓘ
Welsh nationalist activists ⓘ
linked to:
Welsh nationalism
local residents of Capel Celyn ⓘ |
| partOf |
history of Welsh nationalism
ⓘ
history of water supply to English cities ⓘ |
| pointInTime | 1965 ⓘ |
| politicalSignificance |
catalyst for devolution debates in Wales
ⓘ
symbol of perceived English domination over Wales ⓘ |
| purpose |
creation of Llyn Celyn reservoir
ⓘ
water supply for Liverpool ⓘ |
| resultedIn |
creation of Llyn Celyn reservoir
ⓘ
submergence of farms, chapel, and school at Capel Celyn ⓘ |
| significantPlace |
Capel Celyn
ⓘ
Liverpool ⓘ Llyn Celyn ⓘ River Tryweryn ⓘ
linked to:
Afon Tryweryn
|
| startTime | early 1960s ⓘ |
| topicOf |
Welsh historical studies
ⓘ
documentaries about Welsh nationalism ⓘ political speeches in Wales ⓘ |
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: Tryweryn flooding Description of subject: Tryweryn flooding refers to the controversial 1960s inundation of the Welsh village of Capel Celyn to create a reservoir for supplying water to Liverpool, which became a powerful symbol of Welsh nationalism and political protest.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Tryweryn flooding