Question: Which film director was also a German actor, William Dieterle or Edward L. Cahn?
Sentence (from "Ludwig II, King of Bavaria"): Ludwig II, King of Bavaria (German: Ludwig der Zweite, König von Bayern) is a 1929 German silent historical film directed by William Dieterle and starring Dieterle, Theodor Loos and Eugen Burg.
Relevant evidence: No