Question: When was the sovereign duke of the Duchy of Saxe-Coburg and Gotha diedto whom Symphony No. 2 in C major, Op. 140 dedicated to?
Sentence (from "Ernest II, Duke of Saxe-Coburg and Gotha"): Ernest's father became Duke of Saxe-Coburg and Gotha in 1826 through an exchange of territories.
Relevant evidence: No