showtime is nevertheless efficiently amusing for a good while . 
(ROOT (S (NP (NN showtime)) (VP (VBZ is) (ADVP (RB nevertheless)) (ADJP (RB efficiently) (JJ amusing)) (PP (IN for) (NP (DT a) (JJ good) (NN while)))) (. .)))
(ROOT (S (NP (NN )) (VP (VBZ ) (ADVP (RB )) (ADJP (RB ) (JJ )) (PP (IN ) (NP (DT ) (JJ ) (NN )))) (. )))