Complex sentence: He also studied at Columbia University, New York where he earned an MA in African Economic History with Distinction in June 1967, and finally got his PhD in African Economic History with Distinction on February 2 nd 1972.
Split into simpler sentences: He also studied at Columbia University, New York where he earned an MA in African Economic History with Distinction in June 1967. Finally he got his PhD in African Economic History with Distinction on February 2 nd 1972.