You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
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Question: Category: THE BRITISH ISLES 
Clue: This island group that lies just north of the Scottish mainland was known to classical writers as the Orcades

Answer: the orkney islands


Question: Category: HERE'S TO WATER 
Clue: This city's water treatment plant, the world's largest, lies on a 61-acre peninsula that extends into Lake Michigan

Answer: chicago


Question: Category: 20th CENTURY AUTHORS 
Clue: This "Humboldt's Gift" author won both the Pulitzer & Nobel Prizes in 1976

Answer:
saul bellow