Complex sentence: Otelia Cromwell (April 8,1874-April 25,1972) is the first African-American graduate of Smith College, which later began the tradition of canceling afternoon and evening classes in her honor every November as a venue to talk about race and diversity.
Split into simpler sentences: Otelia Cromwell (April 8,1874-April 25,1972) is the first African-American graduate of Smith College. The college later began the tradition of canceling afternoon and evening classes in her honor every November as a venue to talk about race and diversity.