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: __E__E__E 
Clue: A form of address for some royalty, it means calm & unruffled

SOLUTION: serene

PROBLEM: Category: NATIONAL GEOGRAPHIC 
Clue: The Vogalonga, an annual regatta seen here, takes place in this city

SOLUTION: venice

PROBLEM: Category: ELVIS MOVIES 
Clue: Mary Stone on "The Donna Reed Show", she was the only female to co-star with Elvis in 3 films

SOLUTION:
shelley fabares