Complex sentence: Born in Chicago, Illinois, Kluczynski attended public and parochial schools., and during the First World War served overseas as a corporal with the Eighth Field Artillery in 1918 and 1919.
Split into simpler sentences: Born in Chicago, Illinois, Kluczynski attended the public and parochial schools. During the First World War served overseas as a corporal with the Eighth Field Artillery in 1918 and 1919.