Question: Which film has the director who is older than the other, The Dentist 2 or The Grey Magpie? 
Sentence (from "The Grey Magpie"): The Grey Magpie( German: Die graue Elster) is a 1920 German silent mystery film directed by Max Obal and starring Ernst Reicher as the detective Stuart Webbs, part of a long- running series featuring the character.
Relevant evidence: Yes