Complex sentence: Obama's father graduated from the University of Hawaii with a B.A. in economics and left Hawaii in June 1962, and traveled to Cambridge, Massachusetts where he began graduate study in economics at Harvard University in September 1962.
Split into simpler sentences: Obama's father graduated from the University of Hawaii with a B.A. in economics and left Hawaii in June 1962. He moved to Cambridge, Massachusetts where he began graduate study in economics at Harvard University in September 1962.