( ( ( ( An increase ) ( in ( ( the ( harmful form ) ) ( of cholesterol ) ) ) ) ( -- ( ( LDL cholesterol ) -- ) ) ) ( ( ( ( occurs ( in ( the bloodstream ) ) ) , ) ( ( causing ( plaque buildup ) ) ( in ( ( the arteries ) ( which ( can ( ( lead ( to ( heart problems ) ) ) ( because ( it ( inhibits ( ( ( the flow ) ( of blood ) ) ( which ( ( carries oxygen ) ( ( ( to and ) from ) ( the heart ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (DT An) (NN increase)) (PP (IN in) (NP (NP (DT the) (JJ harmful) (NN form)) (PP (IN of) (NP (NN cholesterol)))))) (PRN (: --) (NP (NNP LDL) (NNP cholesterol)) (: --))) (VP (VBZ occurs) (PP (IN in) (NP (DT the) (NN bloodstream))) (, ,) (S (VP (VBG causing) (NP (NN plaque) (NN buildup)) (PP (IN in) (NP (NP (DT the) (NNS arteries)) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB lead) (PP (TO to) (NP (NN heart) (NNS problems))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ inhibits) (NP (NP (DT the) (NN flow)) (PP (IN of) (NP (NN blood))) (SBAR (WHNP (WDT which)) (S (VP (VBZ carries) (NP (NN oxygen)) (PP (TO to) (CC and) (IN from) (NP (DT the) (NN heart))))))))))))))))))) (. .)))
An increase in the harmful form of cholesterol -- LDL cholesterol -- occurs in the bloodstream, causing plaque buildup in the arteries which can lead to heart problems because it inhibits the flow of blood which carries oxygen to and from the heart.
(ROOT (S (NP (NP (DT An) (NN increase)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (NN cholesterol) (NNS levels)))) (VP (MD can) (VP (VB lead) (PP (TO to) (NP (NP (PRP$ your) (NNS arteries)) (VP (VBG filling) (PP (IN with) (NP (NN plaque)))))))) (. .)))