Triple

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).

Phrase: Elan Valley water supply system | Statement: [Pen-y-garreg Reservoir, partOf, Elan Valley water supply system]

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.