( ( ( ( ( Many ( other animals ) ) , ) ( including mammals ) ) , ) ( also ( ( have ( ( ( four-chambered hearts ) , ) ( which ( have ( a ( similar function ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (JJ Many) (JJ other) (NNS animals)) (, ,) (PP (VBG including) (NP (NNS mammals))) (, ,)) (ADVP (RB also)) (VP (VBP have) (NP (NP (JJ four-chambered) (NNS hearts)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP have) (NP (DT a) (JJ similar) (NN function))))))) (. .)))
Many other animals, including mammals, also have four-chambered hearts, which have a similar function.
(ROOT (S (NP (DT All) (NNS mammals)) (VP (VBP have) (NP (CD four) (NNS limbs))) (. .)))