Complex sentence: He may have been influenced by some Ambrose Bierce stories he found in the stacks of the campus library of the University of North Carolina at Charlotte, returning to Pittsburgh to study Physics at Carnegie-Mellon University.
Split into simpler sentences: He may have been influenced by some Ambrose Bierce stories he found in the stacks of the campus library of the University of North Carolina at Charlotte. Barton returned to Pittsburgh to study Physics at Carnegie-Mellon University.