Complex sentence: Martin Brian Mulroney (born March 20,1939), PC, CC, GOQ, was the 18th Prime Minister of Canada from September 17,1984 to June 25,1993, and was leader of the Progressive Conservative Party of Canada from 1983 to 1993.
Split into simpler sentences: Martin Brian Mulroney (born March 20,1939), PC, CC, GOQ is a retired Canadian politician. He was the 18th Prime Minister of Canada from September 17,1984 to June 25,1993, and was leader of the Progressive Conservative Party of Canada from 1983 to 1993.