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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: WHICH U.S. CABINET DEPARTMENT? 
Clue: The Federal Bureau of Prisons

SOLUTION: justice

PROBLEM: Category: COLORFUL LANGUAGE 
Clue: A karate kid may aspire to this high rank, kuroi-obi in Japanese

SOLUTION: a black belt

PROBLEM: Category: IT'S A GROUP THING 
Clue: Scary, Sporty, Baby & Posh

SOLUTION:
the spice girls