Question: What is the date of death of Ngô Đình Nhu's wife?
Sentence (from "Ngô Đình Nhu"): He was known for making such public statements as promising to demolish the Xá Lợi Pagoda and vowing to kill his estranged father-in-law, Trần Văn Chương, who was the regime's ambassador to the United States, after the elder man condemned the Ngô family's behavior and disowned his daughter, Nhu's wife, Madame Nhu.
Relevant evidence: Yes