Question: What nationality is the director of film Seven Faces?
Sentence (from "Seven Faces"): Based upon the piece of short fiction "A Friend of Napoleon" which was published in the June 30, 1923, issue of "The Saturday Evening Post" magazine by popular writer Richard Connell (whose best known work, "The Most Dangerous Game", was filmed three years later), it was directed by Berthold Viertel and stars Paul Muni in his second screen appearance. "
Relevant evidence: Yes