( ( ( ( Atherosclerosis , ) ( ( the buildup ) ( of ( plaque ( on ( artery walls ) ) ) ) ) ) , ) ( ( can ( ( reduce ( blood flow ) ) ( to ( heart tissue ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Atherosclerosis)) (, ,) (NP (NP (DT the) (NN buildup)) (PP (IN of) (NP (NP (NN plaque)) (PP (IN on) (NP (NN artery) (NNS walls)))))) (, ,)) (VP (MD can) (VP (VB reduce) (NP (NN blood) (NN flow)) (PP (TO to) (NP (NN heart) (NN tissue))))) (. .)))
Atherosclerosis, the buildup of plaque on artery walls, can reduce blood flow to heart tissue.
(ROOT (S (PP (IN In) (NP (NNS atherosclerosis))) (, ,) (NP (NP (NN thickening)) (PP (IN of) (NP (NP (DT an) (JJ arterial) (NN wall)) (ADJP (JJ due) (PP (TO to) (NP (NN plaque) (NN formation))))))) (VP (MD can) (VP (VB restrict) (NP (NN blood) (NN flow)) (PP (IN through) (NP (DT the) (NN artery))))) (. .)))