Complex sentence: Ernst Horn studied classical music in Munich, Freiburg and Hamburg and worked as a conductor in state theatres in Karlsruhe and Oldenburg, he was also a conductor and a pianist in the Bavarian State Theatre in Munich.
Split into simpler sentences: Ernst Horn studied classical music in Munich, Freiburg and Hamburg and worked as a conductor in state theatres in Karlsruhe and Oldenburg. He was also a conductor and a pianist in the Bavarian State Theatre in Munich.