Question: When did Duchess Charlotte Frederica Of Mecklenburg-Schwerin's husband die?
Sentence (from "Duchess Charlotte Frederica of Mecklenburg-Schwerin"): She was a daughter of Frederick Francis I, Grand Duke of Mecklenburg-Schwerin, and Princess Louise of Saxe-Gotha-Altenburg, the seventh of the couple's surviving children born at Ludwigslust's court.
Relevant evidence: No