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 "Bezhin Meadow"): Pavlik Morozov was immortalized in school programs, poetry, music, and in film.
Relevant evidence: No