Complex sentence: After seven years in power the NDP was defeated in 1992 and the Yukon Party's John Ostashek became Premier of Yukon but his government proved to be very unpopular by increasing taxes and cutting services.
Split into simpler sentences: After seven years in power, the NDP was defeated in 1992 and the Yukon Party's John Ostashek became Premier of Yukon. His government became very unpopular by increasing taxes and cutting services.