Complex sentence: Arlette Laguiller (born March 18,1940) has since 1973 been the spokeswoman and by far the best known leader of the "Lutte Ouvrière", a French Trotskyist political party.
Split into simpler sentences: Arlette Laguiller (born March 18,1940) is a French Trotskyist politician. Since 1973, she has been the spokeswoman and the best known leader of the "Lutte Ouvrière" political party.