( ( Diseases ( of ( the ( ( heart and ) ( blood vessels ) ) ) ) ) ( ( ( are now ) ( ( the ( leading cause ) ) ( of ( death ( in ( the ( United States ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Diseases)) (PP (IN of) (NP (DT the) (NX (NX (NN heart)) (CC and) (NX (NN blood) (NNS vessels)))))) (VP (VBP are) (ADVP (RB now)) (NP (NP (DT the) (VBG leading) (NN cause)) (PP (IN of) (NP (NP (NN death)) (PP (IN in) (NP (DT the) (NNP United) (NNPS States))))))) (. .)))
Diseases of the heart and blood vessels are now the leading cause of death in the United States.
(ROOT (S (NP (NNP Heart) (NN disease)) (VP (VBZ is) (NP (NP (DT the) (VBG leading) (NN cause)) (PP (IN of) (NP (NN death))) (PP (IN in) (NP (DT the) (VBN united) (NNS states))))) (. .)))