Complex sentence: He served as a parliamentary secretary in the early 1970s, first to the Minister of Indian Affairs and Northern Development and then to the Finance Minister before being appointed to the Cabinet by Pierre Trudeau in 1974 as Minister of Indian Affairs.
Split into simpler sentences: He served as a parliamentary secretary in the early 1970s, first to the Minister of Indian Affairs and Northern Development, and then to the Finance Minister. He was appointed to the Cabinet by Prime Minister Pierre Trudeau in 1974 as Minister of Indian Affairs.