Complex sentence: William Thornton is an American politician from Kansas who is currently serving as the Kansas Secretary of Commerce, having been appointed by Governor Mark Parkinson when David Kerr resigned to serve as the Missouri's Director of the Department of Economic Development.
Split into simpler sentences: William Thornton is an American politician from Kansas who is the Kansas Secretary of Commerce. He was appointed by Governor Mark Parkinson when David Kerr resigned to serve as the Missouri's Director of the Department of Economic Development.