Question: When is Matilda Of Boulogne, Duchess Of Brabant's mother's birthday?
Sentence (from "Margaret I, Countess of Burgundy"): She was also countess of Flanders, Nevers and Rethel by marriage to Louis I, Count of Flanders, and regent of Flanders during the minority of her son Louis II, Count of Flanders in 1346.
Relevant evidence: No