Complex sentence: Alexander Van der Bellen (born 18 January 1944) is an Austrian economist and politician, chairman of the parliamentary club and federal spokesperson of the Austrian Green Party from 1997 to 2008.
Split into simpler sentences: Alexander Van der Bellen (born 18 January 1944) is an Austrian economist and politician. A member of the Austrian Green Party, he was chairman of the parliamentary club and federal spokesperson of his party from 1997 to 2008.