Question: The 1985 film "Return to Oz" is loosely based on which of L. Frank Baum's books?
Sentence (from "Return to Oz"): It is loosely based on L. Frank Baum's "Oz" novels, mainly "The Marvelous Land of Oz" (1904) and "Ozma of Oz" (1907), yet is set six months after the events of the first novel, "The Wonderful Wizard of Oz" (1900) took place.
Relevant evidence: Yes