are the greatest musicians of all time . 
(ROOT (S (VP (VBP are) (NP (NP (DT the) (JJS greatest) (NNS musicians)) (PP (IN of) (NP (DT all) (NN time))))) (. .)))
(ROOT (S (VP (VBP ) (NP (NP (DT ) (JJS ) (NNS )) (PP (IN ) (NP (DT ) (NN ))))) (. )))