's incredible the number of stories 
(ROOT (VP (VBZ 's) (ADJP (JJ incredible)) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS stories))))))
(ROOT (VP (VBZ ) (ADJP (JJ )) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS ))))))