Complex sentence: Mark Stevens, (born June 3,1947 in Queens, New York, U.S.) is a CEO, leading authority of marketing and management, an author and media commentator on the intersection of business and private life.
Split into simpler sentences: Mark Stevens, (born June 3,1947 in Queens, New York, U.S.) is an American businessman, writer, and columnist. He is the CEO, leading authority of marketing and management, an author and media commentator on the intersection of business and private life.