Question: What year did Larry McMurtry's screenplay adaptation about the complex emotional and homosexual relationship between Ennis Del Mar and Jack Twist in the American West from 1963 to 1983 win him an oscar?
Sentence (from "Brokeback Mountain"): Brokeback Mountain is a 2005 American neo-western romantic drama film directed by Ang Lee and produced by Diana Ossana and James Schamus.
Relevant evidence: Yes