in the work of the director , frank novak , that keeps the film grounded in an undeniable social realism 
(ROOT (PP (IN in) (NP (NP (NP (DT the) (NN work)) (PP (IN of) (NP (NP (DT the) (NN director)) (, ,) (NP (JJ frank) (NN novak)) (, ,)))) (SBAR (WHNP (WDT that)) (S (VP (VBZ keeps) (NP (DT the) (NN film)) (S (VP (VBN grounded) (PP (IN in) (NP (DT an) (JJ undeniable) (JJ social) (NN realism)))))))))))
(ROOT (PP (IN ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (, ) (NP (JJ ) (NN )) (, )))) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (NP (DT ) (NN )) (S (VP (VBN ) (PP (IN ) (NP (DT ) (JJ ) (JJ ) (NN )))))))))))