the number of tumbleweeds blowing through the empty theaters 
(ROOT (NP (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS tumbleweeds)))) (VP (VBG blowing) (PP (IN through) (NP (DT the) (JJ empty) (NNS theaters))))))
(ROOT (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS )))) (VP (VBG ) (PP (IN ) (NP (DT ) (JJ ) (NNS ))))))