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.

Input: Consider Input: Category: A WALK ACROSS THE CHARLES BRIDGE 
Clue: Originally called Stone Bridge, the Charles Bridge was built with this "stone", like the walls of the White House

Output: sandstone


Input: Consider Input: Category: VIRGINIA MILITARY INSTITUTE 
Clue: Among VMI's most famous graduates is this 20th century 5-star general & Nobel Peace Prize winner

Output: george marshall


Input: Consider Input: Category: NATIONAL INVENTORS HALL OF FAME 
Clue: "'Snow White and the Seven Dwarfs' was the first full length animated film to use" this inductee's multiplane camera


Output: walt disney