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: A CAST OF THOUSANDS
Clue: It's what you're trying to catch when you're fly-casting

SOLUTION: fish

PROBLEM: Category: EUROPEAN VACATION
Clue: While in Rome, it's possible to stand with one foot in each of these countries

SOLUTION: italy & vatican city

PROBLEM: Category: NICKNAMES
Clue: He's been called "The World's Oldest Living Teenager"

SOLUTION:
dick clark