jason x is this bad on purpose 
(ROOT (S (NP (NN jason) (NN x)) (VP (VBZ is) (NP (DT this) (JJ bad)) (PP (IN on) (NP (NN purpose))))))
(ROOT (S (NP (NN ) (NN )) (VP (VBZ ) (NP (DT ) (JJ )) (PP (IN ) (NP (NN ))))))