not smart or barbed enough for older viewers 
(ROOT (ADJP (RB not) (JJ smart) (CC or) (VBN barbed) (RB enough) (PP (IN for) (NP (JJR older) (NNS viewers)))))
(ROOT (ADJP (RB ) (JJ ) (CC ) (VBN ) (RB ) (PP (IN ) (NP (JJR ) (NNS )))))