by turns very dark and very funny . 
(ROOT (PP (IN by) (S (VP (VBZ turns) (ADJP (ADJP (RB very) (JJ dark)) (CC and) (ADJP (RB very) (JJ funny))))) (. .)))
(ROOT (PP (IN ) (S (VP (VBZ ) (ADJP (ADJP (RB ) (JJ )) (CC ) (ADJP (RB ) (JJ ))))) (. )))