Question: Why did the director of film Sky Bride die?
Sentence (from "Sky Bride"): "Sky Bride" depicts the life of barnstorming pilots flying in the years following World War I. All over North America, skilled pilots, many of them veterans of the aerial combat of World War I, plied their trade on the barnstorming circuit of the 1920s in small towns where impromptu air shows were staged.
Relevant evidence: No