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: DOUBLE A 
Clue: Biblical man with a talking ass

Output: balaam


Input: Consider Input: Category: REQUESTS 
Clue: This U.S. Top 10 hit by Spandau Ballet will take me right back to slow dancing in '83


Output: "true"