keeps the film grounded in an undeniable social realism 
(ROOT (S (VP (VBZ keeps) (S (NP (DT the) (NN film)) (VP (VBN grounded) (PP (IN in) (NP (DT an) (JJ undeniable) (JJ social) (NN realism))))))))
(ROOT (S (VP (VBZ ) (S (NP (DT ) (NN )) (VP (VBN ) (PP (IN ) (NP (DT ) (JJ ) (JJ ) (NN ))))))))