Question: What is the date of death of Ngô Đình Lệ Thủy's mother?
Sentence (from "Ngô Đình Lệ Thủy"): Lệ Thủy (1945 – 1967) was the daughter of South Vietnam’s First lady Madame Nhu and Ngô Đình Nhu, the head of the Personalist Labor Revolutionary Party.
Relevant evidence: Yes