Complex sentence: Her father worked in a factory as a flight mechanic during World War II and continued in aviation after the war ended, and her mother, from an Oklahoma farming family, had come to southern California as a teenager with family friends fleeing the Dust Bowl.
Split into simpler sentences: Her father worked in a factory as a flight mechanic during World War II and continued in aviation after the war ended. Her mother, from an Oklahoma farming family, had come to southern California as a teenager with family friends fleeing the Dust Bowl.