Question: What is the date of death of Princess Mary Of Great Britain's husband?
Sentence (from "Princess Mary of Great Britain"): Princess Mary of Great Britain (5 March 1723 – 14 January 1772) was the second-youngest daughter of King George II of Great Britain and his wife, Caroline of Ansbach, and Landgravine of Hesse-Kassel as the wife of Frederick II, Landgrave of Hesse-Kassel.
Relevant evidence: Yes