the young actors , not very experienced , are sometimes inexpressive 
(ROOT (S (NP (NP (DT the) (JJ young) (NNS actors)) (, ,) (ADJP (RB not) (RB very) (VBN experienced)) (, ,)) (VP (VBP are) (ADVP (RB sometimes)) (ADJP (JJ inexpressive)))))
(ROOT (S (NP (NP (DT ) (JJ ) (NNS )) (, ) (ADJP (RB ) (RB ) (VBN )) (, )) (VP (VBP ) (ADVP (RB )) (ADJP (JJ )))))