it desperately wants to be a wacky , screwball comedy , but 
(ROOT (S (NP (PRP it)) (ADVP (RB desperately)) (VP (VBZ wants) (S (VP (TO to) (VP (VB be) (NP (DT a) (JJ wacky) (, ,) (JJ screwball) (NN comedy)))))) (, ,) (CC but)))
(ROOT (S (NP (PRP )) (ADVP (RB )) (VP (VBZ ) (S (VP (TO ) (VP (VB ) (NP (DT ) (JJ ) (, ) (JJ ) (NN )))))) (, ) (CC )))