Complex sentence: Nathalie Arthaud (born 23 February 1970) is a teacher in economics in "lycée" and French politician and Lutte Ouvrière candidate for the 2012 presidential election and the 2017 presidential election.
Split into simpler sentences: Nathalie Arthaud (born 23 February 1970) is a secondary school (lycée) economics teacher and French politician. She is the Lutte Ouvrière candidate for the 2012 presidential election and the 2017 presidential election.