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.

Input: Consider Input: Category: U.S. ENDANGERED SPECIES 
Clue: It's not only the chinook; the sockeye species of this fish is endangered also

Output: salmon


Input: Consider Input: Category: ADVENTURES IN LITERATURE 
Clue: The epilogue of this novel says, "I have now told the singular, but veracious story of the opera ghost"

Output: phantom of the opera


Input: Consider Input: Category: THE ROLLING STONES 
Clue: This Stones drummer took the photos in the 1984 book "Chagall's World"


Output: charlie watts