Question: What is the date of death of Judith Of Swabia's mother?
Sentence (from "Agnes of Poitou"): Agnes of Poitou, also called Agnes of Aquitaine or Empress Agnes (– 14 December 1077), a member of the House of Poitiers, was German queen from 1043 and Holy Roman Empress from 1046 until 1056.
Relevant evidence: Yes