title: Matilda of Flanders
context: Matilda of Flanders (French: Mathilde; Dutch: Machteld) (c. 1031 – 2 November 1083) was Queen of England and Duchess of Normandy by marriage to William the Conqueror, and sometime Regent of these realms during his absence. She was the mother of ten children who survived to adulthood, including two kings, William II and Henry I.
question: Who was William I wife?
answers: Matilda of Flanders