keeps lifting the pedestal higher 
(ROOT (S (VP (VBZ keeps) (S (VP (VBG lifting) (NP (DT the) (NN pedestal)) (ADVP (JJR higher)))))))
(ROOT (S (VP (VBZ ) (S (VP (VBG ) (NP (DT ) (NN )) (ADVP (JJR )))))))