provoke introspection in both its characters and its audience 
(ROOT (S (VP (VB provoke) (NP (NN introspection)) (PP (IN in) (NP (CC both) (NP (PRP$ its) (NNS characters)) (CC and) (NP (PRP$ its) (NN audience)))))))
(ROOT (S (VP (VB ) (NP (NN )) (PP (IN ) (NP (CC ) (NP (PRP$ ) (NNS )) (CC ) (NP (PRP$ ) (NN )))))))