instruction:
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.
question:
Category: ANIMALS 
Clue: Buckskin was originally made from the mule & white-tailed species of this ungulate
answer:
deer


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


question:
Category: CARD GAMES 
Clue: This gambling game popular in Europe is called "chemmy" for short
answer:

chemin-de-fer