gaping plot holes sink this ` sub ' 
(ROOT (S (NP (VBG gaping) (NN plot) (NNS holes)) (VP (VBP sink) (NP (DT this) (`` `) (NN sub) ('' ')))))
(ROOT (S (NP (VBG ) (NN ) (NNS )) (VP (VBP ) (NP (DT ) (`` ) (NN ) ('' )))))