Question: What is the date of death of Princess Luise Of Schleswig-Holstein-Sonderburg-Beck's husband?
Sentence (from "Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck"): He was the son of August Philipp, Duke of Schleswig- Holstein- Sonderburg- Beck and Countess Marie Sibylle of Nassau- Saarbrücken.
Relevant evidence: No