Complex sentence: After the war ended, Kosiński and with his parents moved to Jelenia Góra, and by age 22 he had earned two graduate degrees, in history and sociology, at the University of Łódź.
Split into simpler sentences: After the war ended, Kosiński and his parents moved to Jelenia Góra. By age 22 he had earned two graduate degrees, in history and sociology, at the University of Łódź.