Complex sentence: Mattanawcook Academy is a public high school located in Lincoln, Maine that was founded in 1847 as Lincoln High School and changed to Mattanawcook Academy in 1850.
Split into simpler sentences: Mattanawcook Academy is a public high school located in Lincoln, Maine that was founded in 1847 as Lincoln High School. The name was changed to Mattanawcook Academy in 1850.