Complex sentence: He moved to Paris to pursue his career, frequenting Henri Langlois's Cinémathèque Française and other ciné-clubs; there, he met François Truffaut, Jean-Luc Godard, Éric Rohmer, Claude Chabrol and other future members of the New Wave.
Split into simpler sentences: He moved to Paris to pursue his career and frequented Henri Langlois's Cinémathèque Française and other ciné-clubs. In Paris he met François Truffaut, Jean-Luc Godard, Éric Rohmer, Claude Chabrol and other future members of the New Wave.