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: U.S. GEOGRAPHY 
Clue: The West Point Military Reservation includes Constitution Island, which lies in this river

SOLUTION: the hudson river

PROBLEM: Category: LAW 
Clue: In Latin legal lingo it means "by the fact itself"

SOLUTION: ipso facto

PROBLEM: Category: EGYPTIAN FILM FESTIVAL 
Clue: In 1932 he starred as "The Mummy" in the daddy of all mummy movies

SOLUTION:
boris karloff