Complex sentence: Bitterly anti-Nazi, Grosz left Germany in 1932, a year before Hitler came to power, and was invited to teach at the Art Students League of New York in 1933, where he would teach intermittently until 1955.
Split into simpler sentences: Bitterly anti-Nazi, Grosz left Germany in 1932, a year before Hitler came to power. He was invited to teach at the Art Students League of New York in 1933, where he would teach intermittently until 1955.