Complex sentence: He started his primary education at the St. Joseph's school in Kumasi in 1943, and then proceeded to enter the Opoku Ware Secondary School in 1953 where he graduated in 1957 with a West African School Certificate.
Split into simpler sentences: He started his primary education at the St. Joseph's school in Kumasi in 1943. He entered the Opoku Ware Secondary School in 1953 and graduated in 1957 with a West African School Certificate.