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.

Category: OPERAS BY CONTINENT 
Clue: "Aida "
africa

Category: SOUTH OF THE BORDER 
Clue: Known as J.C., this boxing champion won titles in 3 weight divisions & more than 100 pro fights
julio cesar chavez

Category: NO.1 WITH A BULLET 
Clue: This title character of a Jim Croce No. 1 carried "a 32 gun in his pocket for fun"

"bad, bad leroy brown"