Trawsfynydd Lake
E891787
Trawsfynydd Lake is a large man-made reservoir in Gwynedd, Wales, known for its scenic surroundings and historical association with the nearby Trawsfynydd nuclear power station.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Trawsfynydd Lake canonical | 3 |
| Trawsfynydd lake | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10749594 — 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: Trawsfynydd Lake Context triple: [Gellilydan, locatedNear, Trawsfynydd Lake]
-
A.
Bassenthwaite Lake
Bassenthwaite Lake is a large, shallow lake in England’s Lake District National Park, noted for its scenic setting beneath the Northern Fells and its importance as a wildlife habitat.
-
B.
Grosvenor Lake
Grosvenor Lake is a remote Alaskan lake known for its pristine wilderness setting and abundant wildlife within Katmai National Park and Preserve.
-
C.
Thirlmere
Thirlmere is a reservoir in England’s Lake District, known for its scenic mountain surroundings and role in supplying water to the city of Manchester.
-
D.
Thirlmere
Thirlmere is a small town in New South Wales, Australia, known for its historic railway heritage and proximity to the Thirlmere Lakes.
-
E.
Garreg Ddu Reservoir
Garreg Ddu Reservoir is a scenic man-made lake in the Elan Valley of mid-Wales, known for its distinctive submerged dam and role in supplying water to the city of Birmingham.
- 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: Trawsfynydd Lake Target entity description: Trawsfynydd Lake is a large man-made reservoir in Gwynedd, Wales, known for its scenic surroundings and historical association with the nearby Trawsfynydd nuclear power station.
-
A.
Bassenthwaite Lake
Bassenthwaite Lake is a large, shallow lake in England’s Lake District National Park, noted for its scenic setting beneath the Northern Fells and its importance as a wildlife habitat.
-
B.
Grosvenor Lake
Grosvenor Lake is a remote Alaskan lake known for its pristine wilderness setting and abundant wildlife within Katmai National Park and Preserve.
-
C.
Thirlmere
Thirlmere is a small town in New South Wales, Australia, known for its historic railway heritage and proximity to the Thirlmere Lakes.
-
D.
Thirlmere
Thirlmere is a reservoir in England’s Lake District, known for its scenic mountain surroundings and role in supplying water to the city of Manchester.
-
E.
Garreg Ddu Reservoir
Garreg Ddu Reservoir is a scenic man-made lake in the Elan Valley of mid-Wales, known for its distinctive submerged dam and role in supplying water to the city of Birmingham.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
man-made lake
ⓘ
reservoir ⓘ |
| adjacentTo | Trawsfynydd nuclear power station ⓘ |
| basinCountry |
United Kingdom
ⓘ
Wales ⓘ |
| constructedFor | Trawsfynydd nuclear power station ⓘ |
| country | Wales ⓘ |
| createdBy | damming of the Afon Prysor ⓘ |
| governedBy | local authorities in Gwynedd ⓘ |
| hasArea |
approximately 1200 acres
ⓘ
approximately 4.8 square kilometres ⓘ |
| hasEcologicalFeature |
aquatic bird habitats
ⓘ
freshwater fish populations ⓘ |
| hasIsland | several small islands ⓘ |
| hasLanguageRegion | Welsh-speaking area ⓘ |
| hasRecreationalPath | lakeside footpaths ⓘ |
| hasRecreationalUseRegulation | fishing permits required ⓘ |
| hasShoreLength | approximately 8 miles ⓘ |
| inflow | Afon Prysor ⓘ |
| knownFor |
proximity to Trawsfynydd nuclear power station
ⓘ
scenic surroundings ⓘ |
| locatedIn |
Gwynedd
ⓘ
Snowdonia National Park ⓘ
linked to:
Snowdonia
historic county of Merionethshire ⓘ north-west Wales ⓘ |
| locatedNear |
Blaenau Ffestiniog
ⓘ
Trawsfynydd ⓘ |
| nearbyCulturalFeature |
historic village of Trawsfynydd
ⓘ
remains of Trawsfynydd nuclear power station infrastructure ⓘ |
| nearbyRoad | A470 road NERFINISHED ⓘ |
| nearbySettlement | village of Trawsfynydd ⓘ |
| nearbyStructure |
Trawsfynydd dam
ⓘ
linked to:
Trawsfynydd
|
| outflow | Afon Prysor ⓘ |
| partOf | Afon Prysor catchment ⓘ |
| popularFor |
coarse fishing
ⓘ
pike fishing ⓘ walking ⓘ wildlife watching ⓘ |
| surroundedBy |
mountain scenery
ⓘ
upland moorland ⓘ |
| usedFor |
boating
ⓘ
cooling water supply ⓘ recreational fishing ⓘ tourism ⓘ |
| waterBodyType | freshwater lake ⓘ |
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: Trawsfynydd Lake Description of subject: Trawsfynydd Lake is a large man-made reservoir in Gwynedd, Wales, known for its scenic surroundings and historical association with the nearby Trawsfynydd nuclear power station.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Trawsfynydd Lake
linked to: Trawsfynydd Lake