Question: Who is the mother-in-law of Alexandra Prinzessin Von Hannover?
Sentence (from "Alexandra Prinzessin von Hannover"): Maria Friederike Benigna Dorothea Prinzessin zu Ysenburg und Büdingen"; 23 October 1937 – 1 June 2015) was a German politician, philanthropist, and wife of Prince Welf Henry of Hanover.
Relevant evidence: Yes