Question: What film by the well-known Russian film director who directed silent films such as "Strike (1925), and "Battleship Potemkin(1925) was based on the true story of Pavlik Morozov and thought to have been destroyed before its completion?
Sentence (from "A Spectre Haunts Europe"): It is based on Edgar Allan Poe's story "The Masque of the Red Death".
Relevant evidence: No