a movie with a bigger , fatter heart 
(ROOT (NP (NP (DT a) (NN movie)) (PP (IN with) (NP (DT a) (JJR bigger) (, ,) (JJR fatter) (NN heart)))))
(ROOT (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (JJR ) (, ) (JJR ) (NN )))))