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 "Diana von Solange"): In 1859, Franz Liszt wrote an orchestral "Festmarsch nach Motiven von E. H. z. S-C-G", S.116, based on themes from "Diana von Solange" (E. H. z. S-C-G was short for Ernst Herzog zu Sachsen-Coburg-Gotha).
Relevant evidence: No