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: MUSICAL GROUPS 
Clue: This outspoken rap group led by Chuck D. took its name from a song title that ended "Number One"

SOLUTION: public enemy

PROBLEM: Category: FICTIONAL DETECTIVES 
Clue: "The House Without a Key" was the first case solved by this Chinese detective

SOLUTION: charlie chan

PROBLEM: Category: THE UMPIRE STRIKES BACK 
Clue: In 1996 Roberto Alomar of this baseball team spit on an umpire, who later threatened to kill him

SOLUTION:
the baltimore orioles