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.

Example Input: Category: RULERS 
Clue: In 770 this king of the Franks married Desiderata, daughter of the Lombard king Desiderius
Example Output: charlemagne

Example Input: Category: NORSE 
Clue: Skoll & Fenrir, both this type of fierce canine, will cause mayhem at Ragnarok, the end of the cosmos
Example Output: wolves

Example Input: Category: COLLECTIBLES 
Clue: The "Man in Black" collector plate from the Franklin Mint was the first musical plate authorized by this country icon
Example Output:
johnny cash