( ( The ( human heart ) ) ( ( is ( a ( remarkable organ ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ human) (NN heart)) (VP (VBZ is) (NP (DT a) (JJ remarkable) (NN organ))) (. .)))
The human heart is a remarkable organ.
(ROOT (S (PP (IN In) (NP (NNS humans))) (, ,) (NP (DT the) (NN heart)) (VP (VBZ is) (NP (DT the) (JJ first) (NN organ) (S (VP (TO to) (VP (VP (VB form)) (CC and) (VP (VB become) (ADJP (JJ functional)))))))) (. .)))