Complex sentence: Stephen Allen Schwarzman (born February 14,1947) is an American financier best known as the chairman and CEO of the Blackstone Group, a private equity and financial advisory firm he formed in 1985 with former US Secretary of Commerce Pete Peterson.
Split into simpler sentences: Stephen Allen Schwarzman (born February 14,1947) is an American business magnate and investor. He is best known as the chairman and CEO of the Blackstone Group, a private equity and financial advisory firm he formed in 1985 with former US Secretary of Commerce Pete Peterson.