( ( ( ( ( Diets ( that ( ( ( ( contain ( ( fiber-rich foods ) ( such ( as ( ( fruits and ) vegetables ) ) ) ) ) , ) and ) ( are ( low ( in fat ) ) ) ) ) ) , ) ( saturated ( ( fat and ) cholesterol ) ) ) , ) ( ( are ( linked ( to ( ( a ( reduced risk ) ) ( of ( ( ( heart disease ) and ) ( certain cancers ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNS Diets)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBP contain) (NP (NP (JJ fiber-rich) (NNS foods)) (PP (JJ such) (IN as) (NP (NNS fruits) (CC and) (NNS vegetables))))) (, ,) (CC and) (VP (VBP are) (ADJP (JJ low) (PP (IN in) (ADJP (JJ fat))))))))) (, ,) (VP (VBN saturated) (NP (NN fat) (CC and) (NN cholesterol))) (, ,)) (VP (VBP are) (VP (VBN linked) (PP (TO to) (NP (NP (DT a) (VBN reduced) (NN risk)) (PP (IN of) (NP (NP (NN heart) (NN disease)) (CC and) (NP (JJ certain) (NNS cancers)))))))) (. .)))
Diets that contain fiber-rich foods such as fruits and vegetables, and are low in fat, saturated fat and  cholesterol, are linked to a reduced risk of heart disease and certain cancers.
(ROOT (S (NP (NNP Trans) (NNP fat)) (VP (VBD added) (PP (TO to) (NP (JJ certain) (NNS foods))) (S (VP (TO to) (VP (VB keep) (S (NP (PRP them)) (ADJP (JJ fresher))) (ADVP (RBR longer)) (, ,) (S (NP (NP (NN increase)) (PRN (-LRB- -LRB-) (PRP s) (-RRB- -RRB-))) (NP (NP (DT the) (NN risk)) (PP (IN of) (NP (NN heart) (NN disease))))))))) (. .)))