the problem with `` xxx '' is that its own action is n't very effective . 
(ROOT (S (NP (NP (DT the) (NN problem)) (PP (IN with) (`` ``) (NP (NN xxx)) ('' ''))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP$ its) (JJ own) (NN action)) (VP (VBZ is) (RB n't) (ADJP (RB very) (JJ effective)))))) (. .)))
(ROOT (S (NP (NP (DT ) (NN )) (PP (IN ) (`` ) (NP (NN )) ('' ))) (VP (VBZ ) (SBAR (IN ) (S (NP (PRP$ ) (JJ ) (NN )) (VP (VBZ ) (RB ) (ADJP (RB ) (JJ )))))) (. )))