( ( ( ( ( Explore ( ( the ( life cycle ) ) ( of ( these ( cold-blooded vertebrates ) ) ) ) ) ( as ( they ( ( change ( from ( eggs ( to tadpoles ) ) ) ) ( to ( adult frogs ) ) ) ) ) ) , ) ( ( ( losing ( their gills ) ) and ) ( forming ( lungs ( along ( the way ) ) ) ) ) ) . )
(ROOT (S (VP (VB Explore) (NP (NP (DT the) (NN life) (NN cycle)) (PP (IN of) (NP (DT these) (JJ cold-blooded) (NNS vertebrates)))) (SBAR (IN as) (S (NP (PRP they)) (VP (VBP change) (PP (IN from) (NP (NP (NNS eggs)) (PP (TO to) (NP (NNS tadpoles))))) (PP (TO to) (NP (JJ adult) (NNS frogs)))))) (, ,) (S (VP (VP (VBG losing) (NP (PRP$ their) (NNS gills))) (CC and) (VP (VBG forming) (NP (NP (NNS lungs)) (PP (IN along) (NP (DT the) (NN way)))))))) (. .)))
Explore the life cycle of these cold-blooded vertebrates as they change from eggs to tadpoles to adult frogs, losing their gills and forming lungs along the way.
(ROOT (S (NP (DT A) (NN frog)) (VP (VBZ develops) (NP (PRN (-LRB- -LRB-) (NP (NN a/an)) (-RRB- -RRB-)) (NNS lungs)) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ changes) (PP (IN from) (NP (DT a) (NN tadpole))) (PP (TO to) (NP (DT an) (JJ adult) (NN frog))))))) (. .)))