Question: What is the date of death of William Fitz Robert, 2Nd Earl Of Gloucester's mother?
Sentence (from "William Fitz Robert, 2nd Earl of Gloucester"): William Fitz Robert, 2nd Earl of Gloucester (23 November 1116 – 23 November 1183) was the son and heir of Sir Robert de Caen, 1st Earl of Gloucester, and Mabel FitzRobert of Gloucester, daughter of Robert Fitzhamon and nephew of Empress Matilda.
Relevant evidence: Yes