Question: When did François Joseph, Duke Of Guise's mother die?
Sentence (from "François Joseph, Duke of Guise"): François Joseph de Lorraine (Paris, 28 August 1670 – 16 March 1675, Paris), Duke of Guise, Duke of Alençon and Duke of Angoulême, was the only son of Louis Joseph de Lorraine, Duke of Guise and Élisabeth Marguerite d'Orléans, "suo jure" duchess of Alençon.
Relevant evidence: Yes