Complex sentence: The longest-serving Premier is Robert Ghiz of Prince Edward Island, who has held the position since June 12,2007; the newest Premier is Brian Gallant of New Brunswick, who assumed office on October 7,2014.
Split into simpler sentences: The longest-serving Premier is Robert Ghiz of Prince Edward Island, who has held the position since June 12,2007. The newest Premier is Brian Gallant of New Brunswick, who assumed office on October 7,2014.