Question: What is the date of death of Prince Frederick Henry Eugen Of Anhalt-Dessau's mother?
Sentence (from "Frederick, Hereditary Prince of Anhalt-Dessau"): He was born in Dessau, the only surviving child of Leopold III, Prince and later Duke of Anhalt- Dessau, by his wife Louise, daughter of Frederick Henry, Margrave of Brandenburg- Schwedt.
Relevant evidence: No