Question: What nationality is the director of film Upstairs And Downstairs (1925 Film)?
Sentence (from "Upstairs and Downstairs (1925 film)"): Upstairs and Downstairs (German: Vorderhaus und Hinterhaus) is a 1925 German silent film directed by Richard Oswald and Carl Wilhelm and starring Max Adalbert, Mary Kid and Valeska Stock.
Relevant evidence: Yes