Question: How long did a series of 6 erotic feature films run after being ushered in by the 1965 Danish coming-of-age sex comedy;Sytten?
Sentence (from "Sytten"): Sytten (English title: Erik Soya's 17) is a 1965 Danish coming-of-age sex comedy directed by Annelise Meineche and starring Ole Søltoft and Ghita Nørby.
Relevant evidence: No