city by the sea would slip under the waves . 
(ROOT (S (NP (NP (NN city)) (PP (IN by) (NP (DT the) (NN sea)))) (VP (MD would) (VP (VB slip) (PP (IN under) (NP (DT the) (NNS waves))))) (. .)))
(ROOT (S (NP (NP (NN )) (PP (IN ) (NP (DT ) (NN )))) (VP (MD ) (VP (VB ) (PP (IN ) (NP (DT ) (NNS ))))) (. )))