helps create a complex , unpredictable character 
(ROOT (S (VP (VBZ helps) (VP (VB create) (NP (DT a) (JJ complex) (, ,) (JJ unpredictable) (NN character))))))
(ROOT (S (VP (VBZ ) (VP (VB ) (NP (DT ) (JJ ) (, ) (JJ ) (NN ))))))