( According ( to ( ( ( Darwin 's ) theory ) ( of ( evolution ( by ( natural ( selection ( -LRB- 57 ) ) ) ) ) ) ) ) )
(ROOT (PP (VBG According) (PP (TO to) (NP (NP (NP (NNP Darwin) (POS 's)) (NN theory)) (PP (IN of) (NP (NP (NN evolution)) (PP (IN by) (NP (NP (JJ natural)) (NP (NNP selection) (-LRB- -LRB-) (NNP 57))))))))))
According to Darwin's theory of evolution by natural selection (57
(ROOT (S (NP (NNP Evolution)) (VP (VBZ occurs) (PP (IN by) (NP (NP (JJ natural) (NN selection)) (, ,) (NP (NP (DT a) (NN process)) (SBAR (WHADVP (WRB whereby)) (S (NP (JJ better-adapted) (NNS members)) (VP (VBP pass) (PRT (RP along)) (NP (PRP$ their) (NNS traits)) (, ,) (PP (VBG according) (PP (TO to) (NP (NN darwin))))))))))) (. .)))