Complex sentence: Wilbraham & Monson Academy is a prep school located in Wilbraham, Massachusetts and founded in 1804 and is one of the the fifteen oldest schools on the eastern coast of the United States.
Split into simpler sentences: Wilbraham & Monson Academy is a prep school located in Wilbraham, Massachusetts. Founded in 1804, it is one of the the fifteen oldest schools on the eastern coast of the United States.