an even less capable trio of criminals 
(ROOT (NP (NP (DT an) (ADJP (ADVP (RB even) (RBR less)) (JJ capable)) (NN trio)) (PP (IN of) (NP (NNS criminals)))))
(ROOT (NP (NP (DT ) (ADJP (ADVP (RB ) (RBR )) (JJ )) (NN )) (PP (IN ) (NP (NNS )))))