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.

Ex Input:
Category: __E__E__E
Clue: A form of address for some royalty, it means calm & unruffled

Ex Output:
serene

Ex Input:
Category: PHOTOGRAPHERS
Clue: In April 1875 the Library of Congress gained possession of his Civil War photographic plates for $25,000

Ex Output:
mathew brady

Ex Input:
Category: A STATE OF CIVIL WAR
Clue: On September 17, 1862 Gen. Robert E. Lee's Northern march was halted in this slave-holding Union state

Ex Output:
maryland