Question: Heaven is a documentary film, released in which year, about beliefs concerning the afterlife and heaven in particular, the film was written and directed by Diane Keaton, an American film actress, director and producer?
Sentence (from "Buster Keaton Rides Again"): The film is a behind-the-scenes documentary shot while Buster Keaton's film "The Railrodder" (1965), was being produced.
Relevant evidence: No