Question: What is the cause of death of Princess Louise Of Schleswig-Holstein-Sonderburg-Glücksburg's husband?
Sentence (from "Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg"): Louise was the third child and second eldest daughter of Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Adelheid of Schaumburg-Lippe and a niece of Christian IX of Denmark.
Relevant evidence: No