Complex sentence: In 1912 he sang with the opera company in Philadelphia and in 1913 he sang with the Chicago Opera Company, appearing in several productions including the American premiere of Wilhelm Kienzl's "Der Kuhreigen".
Split into simpler sentences: In 1912 he sang with the opera company in Philadelphia. In 1913 he sang with the Chicago Opera Company, appearing in several productions including the American premiere of Wilhelm Kienzl's "Der Kuhreigen".