Question: What was the title of the father of this sovereign duke of the Duchy of Saxe-Coburg and Gotha who composed the opera "Diana von Solange"?
Sentence (from "Ernest II, Duke of Saxe-Coburg and Gotha"): Ernest II (German: "Ernst August Karl Johann Leopold Alexander Eduard"; 21 June 1818 – 22 August 1893) was the sovereign duke of the Duchy of Saxe-Coburg and Gotha, reigning from 1844 to his death.
Relevant evidence: Yes