Question: What is the date of death of Duchess Auguste Of Württemberg's husband?
Sentence (from "Karl Anselm, 4th Prince of Thurn and Taxis"): Karl Anselm served as "Prinzipalkommissar" at the Perpetual Imperial Diet in Regensburg for Joseph II, Holy Roman Emperor and Francis II, Holy Roman Emperor from 1773 to 1797.
Relevant evidence: No