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: THE CIVIL WAR 
Clue: A century before the U.S.S. Nautilus, the Confederacy had 2 of these new ships, the Pioneer  & the Hunley
Example Output: submarines

Example Input: Category: O FOR A 
Clue: Completely humble yourself for small stones & pebbles
Example Output: grovel for gravel

Example Input: Category: CONGRESSIONAL GLOSSARY 
Clue: Senate Rule 22 governs this procedure used to end filibusters that requires 60 votes to succeed
Example Output:
a cloture