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.
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Question: Category: SPORTS 
Clue: Football's imaginary plane which neither team may cross until the ball is snapped

Answer: the line of scrimmage


Question: Category: ALL CROATIA GREAT & SMALL 
Clue: Better-known name of the man born Josip Broz in Kumrovec, Croatia May 7, 1892

Answer: tito


Question: Category: IF THEY MARRIED... 
Clue: Ms. Khan, once the lead singer of Rufus, feels for Senator Trent & gets this sweet name

Answer:
chaka lott