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 recognized by a family compact of 1904 as possessing rights of succession to the Grand Duchy of Oldenburg in the event of the extinction of the reigning Grand Ducal line.
Relevant evidence: No