Question: What is the cause of death of director of film China Clipper (Film)?
Sentence (from "China Clipper (film)"): China Clipper is a 1936 drama film directed by Ray Enright and written by Frank Wead, produced by First National Pictures, distributed by parent company Warner Brothers, and starring Pat O'Brien, Ross Alexander, Humphrey Bogart and, in his last motion picture appearance, the venerable Henry B. Walthall as "Dad.
Relevant evidence: Yes