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 "Larry McMurtry"): Larry Jeff McMurtry (born June 3, 1936) is an American novelist, essayist, bookseller, and screenwriter whose work is predominantly set in either the old West or in contemporary Texas.
Relevant evidence: Yes