( ( ( Two-chambered heart ) ( The Tetrapods ) ) - )
(ROOT (NP (NP (NP (JJ Two-chambered) (NN heart)) (NP (DT The) (NNPS Tetrapods))) (: -)))
Two-chambered heart The Tetrapods -
(ROOT (S (PP (IN Like) (NP (NP (DT all) (NNS tetrapods)) (PP (IN except) (NP (NNS birds) (CC and) (NNS mammals))))) (, ,) (NP (NNS frogs)) (VP (VBP possess) (NP (NP (DT a) (NN heart)) (PP (IN with) (NP (CD three) (NNS chambers))))) (. .)))