`` based on true events , '' a convolution of language that suggests it 's impossible to claim that it is `` based on a true story '' with a straight face . 
(ROOT (S (`` ``) (PP (VBN based) (PP (IN on) (NP (JJ true) (NNS events)))) (, ,) ('' '') (NP (NP (NP (DT a) (NN convolution)) (PP (IN of) (NP (NN language)))) (SBAR (WHNP (WDT that)) (S (VP (VBZ suggests) (SBAR (S (NP (NP (PRP it))) (VP (VBZ 's) (ADJP (JJ impossible)) (S (VP (TO to) (VP (VB claim) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (`` ``) (VP (VBN based) (PP (IN on) (NP (DT a) (JJ true) (NN story)))) ('' '') (PP (IN with) (NP (DT a) (JJ straight) (NN face)))))))))))))))) (. .)))
(ROOT (S (`` ) (PP (VBN ) (PP (IN ) (NP (JJ ) (NNS )))) (, ) ('' ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN )))) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (SBAR (S (NP (NP (PRP ))) (VP (VBZ ) (ADJP (JJ )) (S (VP (TO ) (VP (VB ) (SBAR (IN ) (S (NP (PRP )) (VP (VBZ ) (`` ) (VP (VBN ) (PP (IN ) (NP (DT ) (JJ ) (NN )))) ('' ) (PP (IN ) (NP (DT ) (JJ ) (NN )))))))))))))))) (. )))