Question: What nationality is the director of film Jettchen Gebert'S Story?
Sentence (from "Jettchen Gebert's Story"): Jettchen Gebert's Story (German:Jettchen Geberts Geschichte) is a 1918 German silent film directed by Richard Oswald and starring Mechthildis Thein, Conrad Veidt and Leo Connard.
Relevant evidence: Yes