( ( Early tetrapods ) ( ( evolved ( from ( ( a group ) ( of ( vertebrates ( known ( as ( the ( tetrapodomorph fishes ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Early) (NNS tetrapods)) (VP (VBD evolved) (PP (IN from) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NP (NNS vertebrates)) (VP (VBN known) (PP (IN as) (NP (DT the) (JJ tetrapodomorph) (NNS fishes))))))))) (. .)))
Early tetrapods evolved from a group of vertebrates known as the tetrapodomorph fishes.
(ROOT (S (NP (NNS Caecillians)) (VP (VBD evolved) (PP (IN from) (NP (JJ tetrapod) (NNS ancestors)))) (. .)))