Question: When did Prince Christian Oscar Of Hanover's mother die?
Sentence (from "Prince Christian Oscar of Hanover"): Prince Christian Oscar of Hanover (1 September 1919 – 10 December 1981) was the fourth child of Ernest Augustus, Duke of Brunswick and his wife Princess Victoria Louise of Prussia, the only daughter of Wilhelm II, German Emperor and Augusta Viktoria of Schleswig-Holstein.
Relevant evidence: Yes