Triple

T9865483
Position Surface form Disambiguated ID Type / Status
Subject Pen-y-garreg Reservoir E239821 entity
Predicate partOf P40 FINISHED
Object Elan Valley water supply system E233870 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: Elan Valley water supply system | Statement: [Pen-y-garreg Reservoir, partOf, Elan Valley water supply system]

Disambiguation candidates (1 decision)

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: Elan Valley water supply system
Context triple: [Pen-y-garreg Reservoir, partOf, Elan Valley water supply system]
  • A. Elan Valley reservoirs chosen
    The Elan Valley reservoirs are a series of scenic man-made lakes in mid-Wales, created in the late 19th and early 20th centuries to supply water to Birmingham and now renowned for their dams, wildlife, and outdoor recreation.
  • B. Chew Valley water supply system
    The Chew Valley water supply system is an integrated network of reservoirs, treatment works, and pipelines in the Chew Valley area that provides potable water to surrounding communities.
  • C. Cambridge water supply system
    The Cambridge water supply system is the municipal infrastructure network that sources, treats, stores, and distributes drinking water to the city of Cambridge, Massachusetts.
  • D. Avon Aqueduct
    The Avon Aqueduct is a historic 19th-century Scottish aqueduct that carries the Union Canal over the River Avon near Linlithgow, and is one of the largest aqueducts of its kind in the United Kingdom.
  • E. Chew Valley reservoirs
    Chew Valley reservoirs are a series of man-made lakes in North Somerset, England, known for supplying drinking water and providing important habitats for wildlife and recreational activities such as birdwatching and fishing.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 batches)

Stage Batch ID Job type Status
creating batch_69ca84e7506c819095cbde4ff16512bb elicitation completed
NER batch_69cdb3ba7f288190a15ebec2cc3112c4 ner completed
NED1 batch_69d1eadd95ac81909a265db37b648df0 ned_source_triple completed
Created at: March 30, 2026, 8:36 p.m.