if the film has a problem , its shortness disappoints : 
(ROOT (S (SBAR (IN if) (S (NP (DT the) (NN film)) (VP (VBZ has) (NP (DT a) (NN problem))))) (, ,) (NP (PRP$ its) (NN shortness)) (VP (VBZ disappoints)) (: :)))
(ROOT (S (SBAR (IN ) (S (NP (DT ) (NN )) (VP (VBZ ) (NP (DT ) (NN ))))) (, ) (NP (PRP$ ) (NN )) (VP (VBZ )) (: )))