( It ( ( ( is ( from ( this group ) ) ) ( that ( ( tetrapod species ) ( continued ( to evolve ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (PP (IN from) (NP (DT this) (NN group))) (SBAR (IN that) (S (NP (JJ tetrapod) (NNS species)) (VP (VBD continued) (S (VP (TO to) (VP (VB evolve)))))))) (. .)))
It is from this group that tetrapod species continued to evolve.
(ROOT (S (NP (NNS Caecillians)) (VP (VBD evolved) (PP (IN from) (NP (JJ tetrapod) (NNS ancestors)))) (. .)))