that kate is n't very bright , but 
(ROOT (S (SBAR (IN that) (S (NP (NNP kate)) (VP (VBZ is) (RB n't) (ADJP (RB very) (JJ bright))))) (, ,) (CC but)))
(ROOT (S (SBAR (IN ) (S (NP (NNP )) (VP (VBZ ) (RB ) (ADJP (RB ) (JJ ))))) (, ) (CC )))