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: TV ON TV 
Clue: "F.Y.I."

SOLUTION: murphy brown

PROBLEM: Category: DIAMONDBACKS 
Clue: Of 8, 16 or 28, the length in feet of the longest diamondback ever recorded (not counting Randy Johnson)

SOLUTION: 8 feet

PROBLEM: Category: JOE-POURRI 
Clue: Though Grolier's Encyclopedia refers to him as "intellectually unimpressive", he ruled the USSR from 1929 to 1953

SOLUTION:
joseph stalin