the improbable `` formula 51 '' is somewhat entertaining 
(ROOT (S (NP (DT the) (JJ improbable) (`` ``) (NN formula) (CD 51) ('' '')) (VP (VBZ is) (ADJP (RB somewhat) (JJ entertaining)))))
(ROOT (S (NP (DT ) (JJ ) (`` ) (NN ) (CD ) ('' )) (VP (VBZ ) (ADJP (RB ) (JJ )))))