Complex sentence: Jill Ellen Stein (born May 14,1950) is an American physician, activist, politician, the Green Party's presumptive nominee for President of the United States in the 2016 election.
Split into simpler sentences: Jill Ellen Stein (born May 14,1950) is an American physician, activist, and politician. She has been described as the Green Party's presumptive nominee for President of the United States in the 2016 election.