Complex sentence: Two months after the premiere of "The Merry Wives" in Berlin on 9 March 1849, he collapsed from a stroke after conducting the cathedral choir and died on the same day that he had been elected as a member of the Prussian Royal Academy of Arts.
Split into simpler sentences: Two months after the premiere of "The Merry Wives" in Berlin on 9 March 1849, he collapsed and died from a stroke after conducting the cathedral choir. The same day, he had been elected a member of the Prussian Royal Academy of Arts.