( ( ( The configuration ) ( of ( the heart ) ) ) ( ( indicates ( that ( is ( had ( ( ( four chambers ) ( rather than ) ) ( three ( ( making it ) ( more ( like ( ( the heart ) ( of ( ( ( a ( ( bird or ) mammal ) ) ( rather than ) ) ( a reptile ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN configuration)) (PP (IN of) (NP (DT the) (NN heart)))) (VP (VBZ indicates) (SBAR (IN that) (S (VP (VBZ is) (VP (VBN had) (NP (NP (CD four) (NNS chambers)) (CONJP (RB rather) (IN than)) (NP (NP (CD three)) (VP (VBG making) (NP (PRP it)) (PP (RBR more) (IN like) (NP (NP (DT the) (NN heart)) (PP (IN of) (NP (NP (DT a) (NN bird) (CC or) (NN mammal)) (CONJP (RB rather) (IN than)) (NP (DT a) (NN reptile)))))))))))))) (. .)))
The configuration of the heart indicates that is had four chambers rather than three making it more like the heart of a bird or mammal rather than a reptile.
(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))))) (. .)))