Question: What is the cause of death of Christopher Chaplin's mother?
Sentence (from "Oona O'Neill"): The first decade of their marriage was spent living in Beverly Hills, but after Chaplin's re-entry permit to the United States was cancelled during a voyage to London in 1952, they moved to Manoir de Ban in the Swiss village of Corsier-sur-Vevey.
Relevant evidence: No