Complex sentence: Upon graduating from high school in 1936, Johnny first enrolled at the University of North Dakota but later enrolled at the University of Missouri where he graduated with both a Bachelor of Arts and Masters Degree in Music Education.
Split into simpler sentences: Upon graduating from high school in 1936, Johnny first enrolled at the University of North Dakota. Later he enrolled at the University of Missouri, where he graduated with both a Bachelor of Arts and Masters Degree in Music Education.