Question: What is the date of death of Elisabeth Of Cleves, Countess Of Schwarzburg-Blankenburg's mother?
Sentence (from "Mary of Burgundy, Duchess of Cleves"): Mary of Burgundy, Duchess of Cleves (1393 – 30 October 1466) was the second child of John the Fearless and Margaret of Bavaria, and an elder sister of Philip the Good.
Relevant evidence: Yes