a hard time sitting through this one 
(ROOT (NP (NP (DT a) (JJ hard) (NN time)) (S (VP (VBG sitting) (PP (IN through) (NP (DT this) (NN one)))))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (S (VP (VBG ) (PP (IN ) (NP (DT ) (NN )))))))