Input: which films can be described by post apocalyptic?
Output: The Matrix, I Am Legend, The Day After Tomorrow, Dawn of the Dead, Planet of the Apes, Dark City, Waterworld, Mad Max, Æon Flux, The Polar Express, Reign of Fire, Mad Max Beyond Thunderdome, Land of the Dead, Delicatessen, Doomsday, The Postman, Nineteen Eighty-Four, Stake Land, Tank Girl, Powder, Cyborg, The Omega Man, Screamers, The Signal, Undead, On the Beach, Cherry 2000, Quintet, Radioactive Dreams