( It ( ( ( may also ) ( help ( prevent ( ( heart ( disease ( , ( diabetes ( and ( certain types ) ) ) ) ) ) ( of cancer ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD may) (ADVP (RB also)) (VP (VB help) (VP (VB prevent) (NP (NP (NN heart) (NN disease) (, ,) (NN diabetes) (CC and) (JJ certain) (NNS types)) (PP (IN of) (NP (NN cancer))))))) (. .)))
It may also help prevent heart disease, diabetes and certain types of cancer.
(ROOT (S (NP (NNP Diabetes)) (VP (VP (VBZ is) (ADJP (JJ unpreventable) (PP (IN in) (NP (DT the) (NN type) (CD one) (NN form))))) (CC but) (VP (MD may) (VP (VB be) (VP (VBN prevented) (PP (IN by) (NP (NN diet))) (SBAR (IN if) (S (NP (PRP it)) (VP (VBZ is) (PP (IN of) (NP (DT the) (JJ second) (NN type)))))))))) (. .)))
Diabetes is unpreventable in the type one form but may be prevented by diet if it is of the second type.