Complex sentence: Adrian D. Smith (born August 19,1944) is an American architect who has designed skyscrapers including the Burj Khalifa, Jin Mao Tower and Trump International Hotel and Tower.
Split into simpler sentences: Adrian D. Smith (born August 19,1944) is an American architect. He designed notable supertall skyscrapers such as the Burj Khalifa, Jin Mao Tower and Trump International Hotel and Tower.