Question: Tonino Valerii co-directed the 1973 film My Name Is Nobody with which legendary Western director?
Sentence (from "Day of Anger"): The film credits the novel "Der Tod ritt dienstags" ("Death Rode on Tuesdays") by Ron Barker (Rolf O. Becker) as its basis, although Valerii and screenwriter Ernesto Gastaldi have attested that this credit was primarily included to appease the West German co-producers, and that although some scenes are partially borrowed from it, the film is not an adaptation of Becker's novel.
Relevant evidence: No