Complex sentence: The United Party only twice held power in the Territory, between 1971 and 1979 under the stewardship of Willard Wheatley, and again between November 1983 to October 1986 under the leadership of Cyril Romney.
Split into simpler sentences: The United Party only twice held power in the Territory. It regained power between November 1983 and October 1986 under the leadership of Cyril Romney.