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"): The film stars Heath Ledger, Jake Gyllenhaal, Anne Hathaway, and Michelle Williams, and depicts the complex emotional and homosexual relationship between Ennis Del Mar and Jack Twist in the American West from 1963 to 1983.
Relevant evidence: Yes