a very talented but underutilized supporting cast 
(ROOT (NP (DT a) (ADJP (ADJP (RB very) (JJ talented)) (CC but) (ADJP (JJ underutilized))) (VBG supporting) (NN cast)))
(ROOT (NP (DT ) (ADJP (ADJP (RB ) (JJ )) (CC ) (ADJP (JJ ))) (VBG ) (NN )))