Question: Which country the director of film Mayerling (1968 Film) is from?
Sentence (from "Mayerling (1968 film)"): It was based on the novels "Mayerling" by Claude Anet and "L'Archiduc" by Michel Arnold and the 1936 film "Mayerling", directed by Anatole Litvak, which dealt with the real-life Mayerling Incident.
Relevant evidence: No