( You ( ( have ( ( four valves ) ( in ( your heart ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBP have) (NP (NP (CD four) (NNS valves)) (PP (IN in) (NP (PRP$ your) (NN heart))))) (. .)))
You have four valves in your heart.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (NNS valves)) (PP (IN in) (NP (DT the) (NN heart))))) (. .)))