Complex sentence: Marvin was a 1916 graduate of Miami University, Oxford, Ohio, where he was a member of Beta Theta Pi Fraternity, he was nicknamed "Monk" and was a stand-out athlete in football, basketball, baseball and tennis.
Split into simpler sentences: Marvin was a 1916 graduate of Miami University, Oxford, Ohio. At Miami University, where he was a member of Beta Theta Pi Fraternity, he was nicknamed "Monk" and was a stand-out athlete in football, basketball, baseball and tennis.