Complex sentence: In June 1936 Underwood undertook a two year fellowship funded by the Commonwealth at the University of Wisconsin, when he returned to Western Australia he was invited to work with the University of Western Australia's Institute of Agriculture.
Split into simpler sentences: In June 1936 Underwood undertook a two year fellowship funded by the Commonwealth at the University of Wisconsin. When he returned to Western Australia, he was invited to work with the University of Western Australia's Institute of Agriculture.