Question: What is the date of death of the director of film Gunfighters (Film)?
Sentence (from "Gunfighters (film)"): Based on the novel "Twin Sombreros" by Zane Grey (the sequel of "Knights of the Range") and with a screenplay by "The Searchers" author Alan Le May, the film is about a gunfighter who lays down his guns after being forced to shoot his best friend, and decides to become a cowhand on a ranch.
Relevant evidence: No