( Tobacco ( ( is ( ( ( a ( leading cause ) ) ( of ( ( death and ) disease ) ) ) ( in ( the ( United States ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Tobacco)) (VP (VBZ is) (NP (NP (DT a) (VBG leading) (NN cause)) (PP (IN of) (NP (NN death) (CC and) (NN disease))) (PP (IN in) (NP (DT the) (NNP United) (NNPS States))))) (. .)))
Tobacco is a leading cause of death and disease 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))))) (. .)))