Question: Which film has the director who is older than the other, Christian Wahnschaffe or Khartoum (Film)? 
Sentence (from "Elliot Silverstein"): Elliot Silverstein( born August 3, 1927, in Boston, Massachusetts) is an American director, who is best known for being the director of the movie" Cat Ballou"( 1965).
Relevant evidence: No