Question: The Grose River, a perennial river that is part of the Hawkesbury-Nepean catchment, the Nepean River, is a major perennial river, located in the south-west and west of Sydney, New South Wales, in which country?
Sentence (from "Nepean River"): The Nepean River and its associated mouth, the Hawkesbury River, virtually encircle the metropolitan region of Sydney.
Relevant evidence: No