( And ( yet ( , ( they ( ( ( have ( ( low incidence ) ( of ( coronary ( heart ( ( disease and ) cancer ) ) ) ) ) ) ( because ( ( ( the kinds ) ( of ( fat ( that ( they ( are eating ) ) ) ) ) ) ( are ( ( the ones ) ( that ( promote ( optimum health ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (CC And) (ADVP (RB yet)) (, ,) (NP (PRP they)) (VP (VBP have) (NP (NP (JJ low) (NN incidence)) (PP (IN of) (NP (JJ coronary) (NN heart) (NN disease) (CC and) (NN cancer)))) (SBAR (IN because) (S (NP (NP (DT the) (NNS kinds)) (PP (IN of) (NP (NP (NN fat)) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP are) (VP (VBG eating)))))))) (VP (VBP are) (NP (NP (DT the) (NNS ones)) (SBAR (WHNP (WDT that)) (S (VP (VB promote) (NP (JJ optimum) (NN health)))))))))) (. .)))
And yet, they have low incidence of coronary heart disease and cancer because the kinds of fat that they are eating are the ones that promote optimum health.
(ROOT (S (NP (NNP Trans) (NNS fats)) (VP (VBP have) (VP (VBN been) (VP (VBN implicated) (PP (IN in) (NP (NP (DT the) (NN presence)) (PP (IN of) (NP (NN heart) (NN disease)))))))) (. .)))