Question: What year was the film based on a book by the writer of Pippy Longstocking released?
Sentence (from "The Brothers Lionheart (1977 film)"): The Brothers Lionheart (Swedish: Bröderna Lejonhjärta ) is a Swedish fantasy film which was released to cinemas in Sweden on 23 September 1977, directed by Olle Hellbom and based on the book with the same name, written by Astrid Lindgren.
Relevant evidence: Yes