a fairly revealing study of its two main characters 
(ROOT (NP (NP (DT a) (ADJP (RB fairly) (JJ revealing)) (NN study)) (PP (IN of) (NP (PRP$ its) (CD two) (JJ main) (NNS characters)))))
(ROOT (NP (NP (DT ) (ADJP (RB ) (JJ )) (NN )) (PP (IN ) (NP (PRP$ ) (CD ) (JJ ) (NNS )))))