Complex sentence: William Joseph Burns (born April 11,1956) a career Foreign Service Officer, was Ambassador of the United States to the Russian Federation from 2005 until 2008, and United States Deputy Secretary of State from 2011 to 2014.
Split into simpler sentences: William Joseph Burns (born April 11,1956) is a career Foreign Service Officer. He was Ambassador of the United States to the Russian Federation from 2005 until 2008, and United States Deputy Secretary of State from 2011 to 2014.