Original sentence: In carrying out the duties of the award, Kelsey appeared in March, 1960 at MIT, the University of Maryland and in Los Angeles to give a talk about the factors which determine the optimum size of aircraft
Edited sentence: In carrying out the duties of the award, Kelsey appeared in March, 1960 at MIT, the University of Maryland, College Park and in Los Angeles to give a talk about the factors which determine the optimum size of aircraft