is able to visualize schizophrenia 
(ROOT (S (VP (VBZ is) (ADJP (JJ able) (S (VP (TO to) (VP (VB visualize) (NP (NN schizophrenia)))))))))
(ROOT (S (VP (VBZ ) (ADJP (JJ ) (S (VP (TO ) (VP (VB ) (NP (NN )))))))))