Complex sentence: Educated at the University of Manitoba and Oxford Universtiy, Pickersgill taught history in Winnipeg before joining the Department of External Affairs in Ottawa and was soon working at the Prime Minister's Office as Assistant Private Secretary to Prime MInister William Lyon Mackenzie King.
Split into simpler sentences: Educated at the University of Manitoba and Oxford Universtiy, Pickersgill taught history in Winnipeg before joining the Department of External Affairs in Ottawa. He was soon working at the Prime Minister's Office as Assistant Private Secretary to Prime MInister William Lyon Mackenzie King.