Question: Which film was released earlier, The Skyrocket or The Secret Of The Iron Door?
Sentence (from "The Secret of the Iron Door"): Tayna zheleznoy dveri) is a 1970 Soviet children's film directed by Mikhail Yuzovsky after a screenplay by Aleksandr Rejzhevsky loosely based on a story" Wizard walked through the city" by Yuri Tomin.
Relevant evidence: Yes