Definition: You are given an open-domain question from an open movie database. Your task is to provide an answer to that question. Try to only include the answer. Do not put it in a sentence.
Input: what films are about kung fu?

The Matrix, Kung Fu Panda, Crouching Tiger, Hidden Dragon, Rush Hour, Kung Fu Panda 2, Rush Hour 2, Hero, Ip Man, Rush Hour 3, The Karate Kid, Kung Fu Hustle, Shanghai Noon, House of Flying Daggers, The Forbidden Kingdom, Big Trouble in Little China, Mortal Kombat, Enter the Dragon, Ip Man 2, Romeo Must Die, The Man with the Iron Fists, Shaolin Soccer, Bulletproof Monk, Big Stan, Rumble in the Bronx, Who Am I?, Drunken Master, Mr. Nice Guy, Police Story, The Big Boss, Fist of Legend, Once Upon a Time in China, Iron Monkey, Game of Death, Armour of God, Project A, The Last Dragon, Twin Dragons, Bullet in the Head, Snake in the Eagle's Shadow, Once Upon a Time in China II, The Banquet, Dragon Tiger Gate, Once Upon a Time in China III, The Young Master, Game of Death II, Circle of Iron