Question: Why did the director of film Bill Bergson Lives Dangerously (1957 Film) die?
Sentence (from "Bill Bergson Lives Dangerously (1957 film)"): (original Swedish name: "Mästerdetektiven Blomkvist lever farligt") is a 1957 Swedish film about Kalle Blomkvist, directed by Olle Hellbom.
Relevant evidence: Yes