Complex sentence: Archie Alphonse Alexander (14 May 1888--4 January 1958) was an African-American mathematician and engineer and an early African-American graduate of the University of Iowa and he was the first to graduate from the University of Iowa's College of Engineering.
Split into simpler sentences: Archie Alphonse Alexander (14 May 1888--4 January 1958) was an African-American mathematician and engineer. He was an early African-American graduate of the University of Iowa and the first to graduate from the University of Iowa's College of Engineering.