Question: Why did the director of film The Vanishing Frontier die?
Sentence (from "The Vanishing Frontier"): The Vanishing Frontier is a 1932 American adventure film directed by Phil Rosen, written by Stuart Anthony, and starring Johnny Mack Brown, Evalyn Knapp, ZaSu Pitts, Raymond Hatton, Ben Alexander, J. Farrell MacDonald and Wallace MacDonald.
Relevant evidence: Yes