Complex sentence: She spent three months of 2001 at the University of Urbana-Champagne, working with Enrico Gratton before returning to Australia to take up an Australian Research Council postdoctoral fellowship.
Split into simpler sentences: She spent three months of 2001 at the University of Urbana-Champagne, working with Enrico Gratton. She then returned to Australia to take up an Australian Research Council postdoctoral fellowship.