( ( The heart ) ( ( ( ( ( is ( ( an example ) ( of ( the ( same kind ) ) ) ) ) , ) but ) ( belongs ( to ( the ( circulatory system ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN heart)) (VP (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (DT the) (JJ same) (NN kind))))) (, ,) (CC but) (VP (VBZ belongs) (PP (TO to) (NP (DT the) (JJ circulatory) (NN system))))) (. .)))
The heart is an example of the same kind, but belongs to the circulatory system.
(ROOT (S (NP (NNS Echinoderms)) (VP (VBP possess) (NP (DT a) (JJ water-based) (NN circulatory) (NN system))) (. .)))