both people 's capacity for evil and their heroic capacity for good 
(ROOT (NP (NP (NP (CC both) (NP (NNS people) (POS 's)) (NN capacity)) (PP (IN for) (NP (NN evil)))) (CC and) (NP (NP (PRP$ their) (JJ heroic) (NN capacity)) (PP (IN for) (ADJP (JJ good))))))
(ROOT (NP (NP (NP (CC ) (NP (NNS ) (POS )) (NN )) (PP (IN ) (NP (NN )))) (CC ) (NP (NP (PRP$ ) (JJ ) (NN )) (PP (IN ) (ADJP (JJ ))))))