Complex sentence: Godbout resigned as Liberal leader in 1950 and was replaced by Georges-Émile Lapalme, who had just resigned his seat in the House of Commons to enter provincial politics and be acclaimed Liberal leader.
Split into simpler sentences: Godbout resigned as Liberal leader in 1950 and was replaced by Georges-Émile Lapalme. Lapalme resigned his seat in the House of Commons to enter provincial politics and was acclaimed Liberal leader.