Question: What is the date of death of Prince Albert Of Schleswig-Holstein-Sonderburg-Glücksburg's mother?
Sentence (from "Prince Albert of Schleswig-Holstein-Sonderburg-Glücksburg"): Albert was the grandfather of Ernst August, Prince of Hanover through his daughter Princess Ortrud of Schleswig-Holstein-Sonderburg-Glücksburg.
Relevant evidence: No