( Mammals ( ( have ( ( ( ( ( ( ( four ( chambered hearts ) ) ( -LRB- ( ( like birds ) -RRB- ) ) ) , ) ( complex ( nervous systems ) ) ) , ) and ) ( large brains ) ) ) . ) )
(ROOT (S (NP (NNS Mammals)) (VP (VBP have) (NP (NP (NP (CD four) (JJ chambered) (NNS hearts)) (PRN (-LRB- -LRB-) (PP (IN like) (NP (NNS birds))) (-RRB- -RRB-))) (, ,) (NP (JJ complex) (JJ nervous) (NNS systems)) (, ,) (CC and) (NP (JJ large) (NNS brains)))) (. .)))
Mammals have four chambered hearts (like birds), complex nervous systems, and large brains.
(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))))) (. .)))