Question: What nationality is the director of film Christina (1929 Film)?
Sentence (from "William K. Howard"): Considered one of Hollywood's leading directors, he directed over 50 films from 1921 to 1946, including "The Thundering Herd" (1925), "The Power and the Glory" (1933), "Fire Over England" (1937), and "Johnny Come Lately" (1943).
Relevant evidence: No