( ( ( Atherosclerosis ( A condition ) ) ( where ( plaque ( ( builds up ) ( ( ( within ( ( the walls ) ( of arteries ) ) ) and ) ( in time ) ) ) ) ) ) ( ( ( may completely ) ( prevent ( blood flow ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNS Atherosclerosis)) (NP (DT A) (NN condition))) (SBAR (WHADVP (WRB where)) (S (NP (NN plaque)) (VP (VBZ builds) (PRT (RP up)) (PP (PP (IN within) (NP (NP (DT the) (NNS walls)) (PP (IN of) (NP (NNS arteries))))) (CC and) (PP (IN in) (NP (NN time)))))))) (VP (MD may) (ADVP (RB completely)) (VP (VB prevent) (NP (NN blood) (NN flow)))) (. .)))
Atherosclerosis A condition where plaque builds up within the walls of arteries and in time may completely prevent blood flow.
(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))))) (. .)))