Question: What nationality is the director of film Her Private Affair?
Sentence (from "Paul L. Stein"): Stein began his career in Berlin in 1918 and worked exclusively in the German silent film industry until 1926, when he first went to Hollywood, and spent the next five years commuting between Germany and the U.S., where he worked with stars such as Jeanette MacDonald, Lillian Gish and Constance Bennett.
Relevant evidence: No