Triple

T7718744
Position Surface form Disambiguated ID Type / Status
Subject Black Mountain (Brecon Beacons) E174952 entity
Predicate nameInWelsh P13076 FINISHED
Object Y Mynydd Du
Y Mynydd Du is the Welsh name for the Black Mountain range, a remote and rugged upland area forming the westernmost part of the Bannau Brycheiniog (Brecon Beacons) National Park in South Wales.
 E684417 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Y Mynydd Du | Statement: [Black Mountain (Brecon Beacons), nameInWelsh, Y Mynydd Du]

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: Y Mynydd Du
Context triple: [Black Mountain (Brecon Beacons), nameInWelsh, Y Mynydd Du]
  • A. Yr Wyddfa
    Yr Wyddfa is the Welsh name for Snowdon, the highest and one of the most iconic mountains in Wales and the entire British Isles.
  • B. Y Bwthyn Bach
    Y Bwthyn Bach is a miniature thatched cottage in the grounds of Windsor’s Royal Lodge, famously given as a playhouse to Princess Elizabeth (later Queen Elizabeth II) in the 1930s.
  • C. Sgwd yr Eira
    Sgwd yr Eira is a famous waterfall in the Brecon Beacons of Wales, known for the footpath that allows visitors to walk behind its curtain of water.
  • D. Traeth yr Afon
    Traeth yr Afon is a sandy beach near Ogmore-by-Sea on the south coast of Wales, known for its scenic views, rock pools, and proximity to the River Ogmore estuary.
  • E. Taf Fawr
    Taf Fawr is one of the principal headwater streams of the River Taff in South Wales, flowing through the Brecon Beacons before joining with other tributaries to form the main river.
  • 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: Y Mynydd Du
Target entity description: Y Mynydd Du is the Welsh name for the Black Mountain range, a remote and rugged upland area forming the westernmost part of the Bannau Brycheiniog (Brecon Beacons) National Park in South Wales.
  • A. Yr Wyddfa
    Yr Wyddfa is the Welsh name for Snowdon, the highest and one of the most iconic mountains in Wales and the entire British Isles.
  • B. Y Bwthyn Bach
    Y Bwthyn Bach is a miniature thatched cottage in the grounds of Windsor’s Royal Lodge, famously given as a playhouse to Princess Elizabeth (later Queen Elizabeth II) in the 1930s.
  • C. Sgwd yr Eira
    Sgwd yr Eira is a famous waterfall in the Brecon Beacons of Wales, known for the footpath that allows visitors to walk behind its curtain of water.
  • D. Traeth yr Afon
    Traeth yr Afon is a sandy beach near Ogmore-by-Sea on the south coast of Wales, known for its scenic views, rock pools, and proximity to the River Ogmore estuary.
  • E. Taf Fawr
    Taf Fawr is one of the principal headwater streams of the River Taff in South Wales, flowing through the Brecon Beacons before joining with other tributaries to form the main river.
  • F. None of above. chosen

How the object was described

The object's one-sentence description was generated by prompting gpt-5.1 with the object name and this triple as context.

Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Y Mynydd Du
Triple: [Black Mountain (Brecon Beacons), nameInWelsh, Y Mynydd Du]
Generated description
Y Mynydd Du is the Welsh name for the Black Mountain range, a remote and rugged upland area forming the westernmost part of the Bannau Brycheiniog (Brecon Beacons) National Park in South Wales.

Provenance (5 batches)

Stage Batch ID Job type Status
creating batch_69c6995c463c8190a14458036249d419 elicitation completed
NER batch_69c702ebb7448190ae8d47fe0cbb0907 ner completed
NED1 batch_69c8b510650481908d65838108a2d632 ned_source_triple completed
NED2 batch_69c8b7359cf48190b48782e2eabd5e6d ned_description completed
NEDg batch_69c8b6bfb96881908d0e82d3efa1e6e2 nedg completed
Created at: March 27, 2026, 4:05 p.m.