a perfectly pleasant if slightly pokey comedy 
(ROOT (NP (DT a) (ADJP (ADJP (RB perfectly) (JJ pleasant)) (SBAR (IN if) (FRAG (ADJP (RB slightly) (JJ pokey))))) (NN comedy)))
(ROOT (NP (DT ) (ADJP (ADJP (RB ) (JJ )) (SBAR (IN ) (FRAG (ADJP (RB ) (JJ ))))) (NN )))