Question: What was the name of the 1939 film based on a biography of a famous nineteenth century songwriter known as "the father of American music"?
Sentence (from "Martino Frontini"): He composed numerous works, becoming especially known for his waltzes; in larger forms, he wrote a three-act lyric opera ("Marco Bozzari"), an ""azione coreografica"" ("Fatima") and a fantastic operetta ("La Rivolta dell'Olimpo").
Relevant evidence: No