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"): Prince Albert of Schleswig-Holstein-Sonderburg-Glücksburg (15 March 1863, Kiel, Duchy of Holstein – 23 April 1948, Glücksburg, Schleswig-Holstein, Germany) was the fifth and youngest child of Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and his wife Princess Adelheid of Schaumburg-Lippe and was a nephew of Christian IX of Denmark.
Relevant evidence: Yes