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: FICTIONAL DETECTIVES 
Clue: "The House Without a Key" was the first case solved by this Chinese detective

Answer: charlie chan


Question: Category: RIVERS 
Clue: In 1951 it was determined that this river's source was in the Sierra Parima of Venezuela

Answer: the orinoco


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

Answer:
tito