it is ok for a movie to be something of a sitcom apparatus , if the lines work , the humor has point and 
(ROOT (S (S (NP (NP (PRP it))) (VP (VBZ is) (ADJP (JJ ok)) (SBAR (IN for) (S (NP (DT a) (NN movie)) (VP (TO to) (VP (VB be) (NP (NP (NN something)) (PP (IN of) (NP (DT a) (NN sitcom) (NN apparatus)))))))))) (, ,) (S (SBAR (IN if) (S (NP (DT the) (NNS lines)) (VP (VBP work)))) (, ,) (NP (DT the) (NN humor)) (VP (VBZ has) (NP (NN point)))) (CC and)))
(ROOT (S (S (NP (NP (PRP ))) (VP (VBZ ) (ADJP (JJ )) (SBAR (IN ) (S (NP (DT ) (NN )) (VP (TO ) (VP (VB ) (NP (NP (NN )) (PP (IN ) (NP (DT ) (NN ) (NN )))))))))) (, ) (S (SBAR (IN ) (S (NP (DT ) (NNS )) (VP (VBP )))) (, ) (NP (DT ) (NN )) (VP (VBZ ) (NP (NN )))) (CC )))