a stunning , taxi driver-esque portrayal of a man teetering on the edge of sanity 
(ROOT (NP (NP (DT a) (JJ stunning) (, ,) (ADJP (NP (NN taxi) (NN driver)) (HYPH -) (JJ esque)) (NN portrayal)) (PP (IN of) (NP (NP (DT a) (NN man)) (VP (VBG teetering) (PP (IN on) (NP (NP (DT the) (NN edge)) (PP (IN of) (NP (NN sanity))))))))))
(ROOT (NP (NP (DT ) (JJ ) (, ) (ADJP (NP (NN ) (NN )) (HYPH ) (JJ )) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (VP (VBG ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN ))))))))))