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.

Category: LEGENDS 
Clue: The "Literature Lover's Book of Lists" says this engineer "blew his train whistle in a special way"
casey jones

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

Category: NUMBER, PLEASE 
Clue: The value of pi is closest to this whole number

3