pacino and williams seem to keep upping the ante on each other , just as their characters do in the film . 
(ROOT (S (NP (NN pacino) (CC and) (NNP williams)) (VP (VBP seem) (S (VP (TO to) (VP (VB keep) (S (VP (VBG upping) (NP (DT the) (NN ante)) (PP (IN on) (NP (DT each) (JJ other))) (, ,) (SBAR (ADVP (RB just)) (IN as) (S (NP (PRP$ their) (NNS characters)) (VP (VBP do) (PP (IN in) (NP (DT the) (NN film)))))))))))) (. .)))
(ROOT (S (NP (NN ) (CC ) (NNP )) (VP (VBP ) (S (VP (TO ) (VP (VB ) (S (VP (VBG ) (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (JJ ))) (, ) (SBAR (ADVP (RB )) (IN ) (S (NP (PRP$ ) (NNS )) (VP (VBP ) (PP (IN ) (NP (DT ) (NN )))))))))))) (. )))