Question: What is the date of death of Prince Hubertus Of Prussia's mother?
Sentence (from "Duchess Cecilie of Mecklenburg-Schwerin"): Duchess Cecilie of Mecklenburg-Schwerin (Cecilie Auguste Marie; 20 September 1886 – 6 May 1954) was the last German Crown Princess and Crown Princess of Prussia as the wife of German Crown Prince Wilhelm, the son of German Emperor Wilhelm II.
Relevant evidence: Yes