( ( like ( the mammals ) ) ( , ( ( ( ( ( they ( have ( ( a coat ) ( of ( ( hair and ) ( a ( four-chambered heart ) ) ) ) ) ) ) , ) and ) ( they ( suckle ( the young ) ) ) ) . ) ) )
(ROOT (S (PP (IN like) (NP (DT the) (NNS mammals))) (, ,) (S (NP (PRP they)) (VP (VBP have) (NP (NP (DT a) (NN coat)) (PP (IN of) (NP (NP (NN hair)) (CC and) (NP (DT a) (JJ four-chambered) (NN heart))))))) (, ,) (CC and) (S (NP (PRP they)) (VP (VBP suckle) (NP (DT the) (JJ young)))) (. .)))
like the mammals, they have a coat of hair and a four-chambered heart, and they suckle the young.
(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))))) (. .)))