this is n't worth sitting through 
(ROOT (S (NP (DT this)) (VP (VBZ is) (RB n't) (ADJP (JJ worth) (S (VP (VBG sitting) (ADVP (RB through))))))))
(ROOT (S (NP (DT )) (VP (VBZ ) (RB ) (ADJP (JJ ) (S (VP (VBG ) (ADVP (RB ))))))))