demonstrate that his pathology evolved from human impulses that grew hideously twisted 
(ROOT (S (VP (VB demonstrate) (SBAR (IN that) (S (NP (PRP$ his) (NN pathology)) (VP (VBD evolved) (PP (IN from) (NP (NP (JJ human) (NNS impulses)) (SBAR (WHNP (WDT that)) (S (VP (VBD grew) (ADJP (RB hideously) (VBN twisted)))))))))))))
(ROOT (S (VP (VB ) (SBAR (IN ) (S (NP (PRP$ ) (NN )) (VP (VBD ) (PP (IN ) (NP (NP (JJ ) (NNS )) (SBAR (WHNP (WDT )) (S (VP (VBD ) (ADJP (RB ) (VBN )))))))))))))