Question: What is the date of death of Princess Luise Of Schleswig-Holstein-Sonderburg-Beck's husband?
Sentence (from "Frederick Ferdinand, Duke of Anhalt-Köthen"): He was the second son of Frederick Erdmann, Prince of Anhalt-Pless, and his wife, Louise Ferdinande, daughter of Henry Ernest, Count of Stolberg-Wernigerode.
Relevant evidence: No