Complex sentence: Arthur W. Galston (1920-2008) was an American botanist and bioethicist who, as a graduate student at the University of Illinois, discovered the defoliant properties of a chemical that was subsequently studied and utilized by the United States Army.
Split into simpler sentences: Arthur W. Galston (1920-2008) was an American botanist and bioethicist. As a graduate student at the University of Illinois, discovered the defoliant properties of a chemical that was subsequently studied and utilized by the United States Army.