Complex sentence: He won the César Award for Best Director in 2007 for his film "Ne le dis à personne" ("Tell no one"), based upon the novel by Harlan Coben, starring François Cluzet as the leading part.
Split into simpler sentences: He won the César Award for Best Director in 2007 for his film "Ne le dis à personne" ("Tell no one"). It is based upon the novel by Harlan Coben and starred François Cluzet as the leading part.