( ( For example ) ( , ( ( ( ( ( ( the backbone ) ( is ( ( a ( common structure ) ) ( among ( ( all vertebrates ) ( such ( as ( fish ( , ( ( reptiles and ) mammals ) ) ) ) ) ) ) ) ) ) , ) and ) ( ( the backbone ) ( also ( appears ( as ( one ( of ( ( the ( earliest structures ) ) ( ( laid out ) ( in ( all ( vertebrate embryos ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (S (NP (DT the) (NN backbone)) (VP (VBZ is) (NP (NP (DT a) (JJ common) (NN structure)) (PP (IN among) (NP (NP (DT all) (NNS vertebrates)) (PP (JJ such) (IN as) (NP (NN fish) (, ,) (NNS reptiles) (CC and) (NNS mammals)))))))) (, ,) (CC and) (S (NP (DT the) (NN backbone)) (ADVP (RB also)) (VP (VBZ appears) (PP (IN as) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (JJS earliest) (NNS structures)) (VP (VBN laid) (PRT (RP out)) (PP (IN in) (NP (DT all) (JJ vertebrate) (NNS embryos)))))))))) (. .)))
For example, the backbone is a common structure among all vertebrates such as fish, reptiles and mammals, and the backbone also appears as one of the earliest structures laid out in all vertebrate embryos.
(ROOT (S (NP (NP (CD One)) (PP (IN of) (NP (NP (DT the) (JJ main) (NNS features)) (SBAR (S (NP (DT all) (NNS vetebrates)) (VP (VBP have) (VP (PP (IN in) (NP (JJ common)))))))))) (VP (VBZ is) (NP (DT a) (NN backbone))) (. .)))