Question: Tonino Valerii co-directed the 1973 film My Name Is Nobody with which legendary Western director?
Sentence (from "The Price of Power"): The film stars Giuliano Gemma as the hero Bill Willer who tries to get revenge against the killers of his father while at the same time trying to prevent an assassination plot against president James Garfield (played by Van Johnson, with José Suárez playing Vice President Chester A. Arthur) in 1881.
Relevant evidence: No