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 consistency, answers should be in all lower cased letters.

Ex Input:
Category: ENVIRONMENTALISM 
Clue: The world's first national park was Yellowstone, opened in 1872; this country opened its first park at Banff in 1887

Ex Output:
canada


Ex Input:
Category: CROSSWORD CLUES "D _ _ _ ER" 
Clue: Macbeth thought he saw one

Ex Output:
a dagger


Ex Input:
Category: "HO" POURRI 
Clue: This goodhearted pachyderm did a favor for a bird by sitting on her egg in a nest in a tree for 51 days

Ex Output:

horton