Complex sentence: Pechstein was a professor at the Berlin Academy for ten years before his dismissal by the Nazis in 1933, only to be reinstated in 1945, winning numerous titles and awards for his work.
Split into simpler sentences: Pechstein was a professor at the Berlin Academy for ten years before his dismissal by the Nazis in 1933. He was reinstated in 1945, and subsequently won numerous titles and awards for his work.