with its unbelievable naïveté and arbitrary flashbacks 
(ROOT (PP (IN with) (NP (NP (PRP$ its) (JJ unbelievable) (JJ naïveté)) (CC and) (NP (JJ arbitrary) (NNS flashbacks)))))
(ROOT (PP (IN ) (NP (NP (PRP$ ) (JJ ) (JJ )) (CC ) (NP (JJ ) (NNS )))))