Complex sentence: By this time he had performed throughout Europe and Scandinavia; he made his American debut in New York on October 17,1916, and soon made his permanent home in the United States, later becoming an American citizen.
Split into simpler sentences: By this time he had performed throughout Europe and Scandinavia. He made his American debut in New York on October 17,1916, and soon made his permanent home in the United States, later becoming an American citizen.