interesting characters or even a halfway intriguing plot 
(ROOT (NP (NP (JJ interesting) (NNS characters)) (CC or) (NP (RB even) (DT a) (ADJP (RB halfway) (JJ intriguing)) (NN plot))))
(ROOT (NP (NP (JJ ) (NNS )) (CC ) (NP (RB ) (DT ) (ADJP (RB ) (JJ )) (NN ))))