Complex sentence: Driscoll Catholic High School was a private college preparatory high school in the village of Addison, Illinois, accredited by the State of Illinois and the North Central Association of Colleges and Schools.
Split into simpler sentences: Driscoll Catholic High School was a private college preparatory high school in the village of Addison, Illinois. It had been accredited by the State of Illinois and the North Central Association of Colleges and Schools.