( ( ( ( ( Most amphibians ) , ) ( such ( as frogs ) ) ) , ) ( ( live ( ( part ( of ( ( their lives ) ( on ( ( land and ) return ) ) ) ) ) ( to ( water ( to breed ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJS Most) (NNS amphibians)) (, ,) (PP (JJ such) (IN as) (NP (NNS frogs))) (, ,)) (VP (VBP live) (S (NP (NP (NN part)) (PP (IN of) (NP (NP (PRP$ their) (NNS lives)) (PP (IN on) (NP (NN land) (CC and) (NN return)))))) (VP (TO to) (VP (VB water) (S (VP (TO to) (VP (VB breed)))))))) (. .)))
Most amphibians, such as frogs, live part of their lives on land and return to water to breed.
(ROOT (S (NP (NNS Frogs)) (VP (VBP are) (VP (VBG amphibians) (NP (NP (DT that) (JJ live) (NN part)) (PP (IN of) (NP (NP (NP (DT the) (NN time)) (PP (IN in) (NP (JJ fresh) (NN water)))) (CC and) (NP (NP (JJ live) (NN rest)) (PP (IN of) (NP (NP (DT the) (NN time)) (PP (IN on) (NP (NN land))))))))))) (. .)))