a definitive account of eisenstein 's life 
(ROOT (NP (NP (DT a) (JJ definitive) (NN account)) (PP (IN of) (NP (NP (NNP eisenstein) (POS 's)) (NN life)))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NP (NNP ) (POS )) (NN )))))