Question: When did Caroline Amalie Of Augustenburg's husband die?
Sentence (from "Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg"): Princess Helena Adelaide of Schleswig-Holstein- Sonderburg- Glücksburg( 1 June 1888- 30 June 1962) was the third eldest daughter of Friedrich Ferdinand, Duke of Schleswig- Holstein and his wife Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Augustenburg.
Relevant evidence: No