Complex sentence: Leah along with her parents fled Poland just before the German invasion in 1939 Shortly after moving from Seattle to Chicago, Berek Zielonka (later known as Bernard) changed the family name to Zell.
Split into simpler sentences: Leah along with her parents fled Poland just before the German invasion in 1939. Once in Chicago, Berek Zielonka (later known as Bernard) changed the family name to Zell.