Question: What film is a story based on a book about another film that was originally a Novel by C.S. Forester written in 1935? 
Sentence (from "White Hunter Black Heart"): The film is a thinly disguised account of writer Peter Viertel's experiences while working on the classic 1951 film "The African Queen", which was shot on location in Africa at a time when location shoots outside of the United States for American films were very rare.
Relevant evidence: Yes