the premise of jason x is silly but strangely believable . 
(ROOT (S (NP (NP (DT the) (NN premise)) (PP (IN of) (NP (NN jason) (NN x)))) (VP (VBZ is) (ADJP (ADJP (JJ silly)) (CC but) (ADJP (RB strangely) (JJ believable)))) (. .)))
(ROOT (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (NN ) (NN )))) (VP (VBZ ) (ADJP (ADJP (JJ )) (CC ) (ADJP (RB ) (JJ )))) (. )))