Question: What is the date of death of Duchess Auguste Of Württemberg's husband?
Sentence (from "Hieronim Wincenty Radziwiłł"): He married Princess Sophie Friederike of Thurn and Taxis, daughter of Karl Anselm, 4th Prince of Thurn and Taxis and his wife Duchess Auguste of Württemberg, on December 31, 1775 in Regensburg.
Relevant evidence: No