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.

Example Input: Category: THIS "BUD"'S FOR YOU 
Clue: It's the practice of pairing swimmers, with each responsible for the other's safety
Example Output: the buddy system

Example Input: Category: SCIENCE GUYS 
Clue: Eugene Dubois died in 1940 still believing his "Java Man" to be this legendary connector between man & ape
Example Output: the missing link

Example Input: Category: PHYSICS 
Clue: In 1954 Charles Townes, James Gordon & Herbert Zeiger developed the first maser, the "M" standing for this
Example Output:
microwave