Triple

T9865513
Position Surface form Disambiguated ID Type / Status
Subject Pen-y-garreg Reservoir E239821 entity
Predicate hasNearbyStructure P231 FINISHED
Object Pen-y-garreg Dam valve tower
The Pen-y-garreg Dam valve tower is a distinctive stone tower structure integral to controlling water flow at the Pen-y-garreg Dam in the Elan Valley, Wales.
 E239821 NE FINISHED

Disambiguation candidates (2 decisions)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Pen-y-garreg Dam valve tower
Context triple: [Pen-y-garreg Reservoir, hasNearbyStructure, Pen-y-garreg Dam valve tower]
  • A. Pen-y-garreg Reservoir
    Pen-y-garreg Reservoir is a scenic man-made lake in the Elan Valley of mid Wales, known for its historic stone dam and role in the region’s water supply system.
  • B. Nant-y-moch Reservoir
    Nant-y-moch Reservoir is a large upland man-made lake in the Cambrian Mountains of mid Wales, known for hydroelectric power generation and its remote, scenic landscape.
  • C. Abbeystead Dam
    Abbeystead Dam is a small reservoir dam in Lancashire, England, known for its role in the 1984 Abbeystead disaster explosion.
  • D. Hafod Arch
    Hafod Arch is a historic stone gateway in Wales that once marked the entrance to the Hafod Estate and now stands as a notable landmark within the Blaenavon Industrial Landscape World Heritage Site.
  • E. 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.
  • 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: Pen-y-garreg Dam valve tower
Target entity description: The Pen-y-garreg Dam valve tower is a distinctive stone tower structure integral to controlling water flow at the Pen-y-garreg Dam in the Elan Valley, Wales.
  • A. Pen-y-garreg Reservoir chosen
    Pen-y-garreg Reservoir is a scenic man-made lake in the Elan Valley of mid Wales, known for its historic stone dam and role in the region’s water supply system.
  • B. Nant-y-moch Reservoir
    Nant-y-moch Reservoir is a large upland man-made lake in the Cambrian Mountains of mid Wales, known for hydroelectric power generation and its remote, scenic landscape.
  • C. Abbeystead Dam
    Abbeystead Dam is a small reservoir dam in Lancashire, England, known for its role in the 1984 Abbeystead disaster explosion.
  • D. Hafod Arch
    Hafod Arch is a historic stone gateway in Wales that once marked the entrance to the Hafod Estate and now stands as a notable landmark within the Blaenavon Industrial Landscape World Heritage Site.
  • E. 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.
  • F. None of above.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69ca84e7506c819095cbde4ff16512bb elicitation completed
NER batch_69cdb3ba7f288190a15ebec2cc3112c4 ner completed
NED1 batch_69d1e4544d008190a70ec0d490da8ef2 ned_source_triple completed
NED2 batch_69d1e598243481909278cb3c911ce3db ned_description completed
NEDg batch_69d1e5204f748190b1f56ee5469828a2 nedg completed
Created at: March 30, 2026, 8:36 p.m.