Complex sentence: He was in 1946 appointed as governor general of Canada by King George VI on the recommendation of Prime Minister of Canada William Lyon Mackenzie King, to replace the Earl of Athlone as viceroy, and he occupied the post until succeeded by Vincent Massey in 1952.
Split into simpler sentences: He was in 1946 appointed as governor general of Canada by King George VI on the recommendation of Prime Minister of Canada William Lyon Mackenzie King, to replace the Earl of Athlone as viceroy. He occupied the post until succeeded by Vincent Massey in 1952.