Question: The father of Otto III was Holy Roman Emperor until his death in what year?
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