Complex sentence: His brother, Carlos Zanelli-Morales (1897-1970), was also a successful baritone, singing under the stage name of Carlo Morelli in Italy, and then at the Met from 1935 to 1940.
Split into simpler sentences: His brother, Carlos Zanelli-Morales (1897-1970), was also a successful baritone. He sang under the stage name of Carlo Morelli in Italy and also at the Met from 1935 to 1940.