Complex sentence: After World War Two Rosvaenge divided his time between Berlin and Vienna, continuing to sing until May 30,1959 (when he gave what was billed as his farewell concert at the Vienna "Great Musikvereinsaal") as Calaf, Radames and Manrico.
Split into simpler sentences: After World War Two Rosvaenge divided his time between Berlin and Vienna. He continued to sing until May 30,1959 (when he gave what was billed as his farewell concert at Vienna's Great Musikvereinsaal), appearing as Calaf, Radames and Manrico.