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

SOLUTION: julio cesar chavez

PROBLEM: Category: THE U.S. SENATE 
Clue: Generally the Senate ends the day by doing this, rather than adjourning

SOLUTION: recessing

PROBLEM: Category: CHEMISTRY 
Clue: This is the chemical formula for dry ice

SOLUTION:
co2