Question: What is the cause of death of director of film Persecution (Film)?
Sentence (from "Persecution (film)"): Persecution (also released as Sheba, The Terror of Sheba and The Graveyard) is a 1974 British psychological horror film directed by Don Chaffey, produced by Kevin Francis and starring Lana Turner, Ralph Bates, Olga Georges-Picot, Trevor Howard and Suzan Farmer.
Relevant evidence: Yes