Diets for men in their prime
( Diets ( for ( men ( in ( their prime ) ) ) ) )
(ROOT (NP (NP (NNS Diets)) (PP (IN for) (NP (NP (NNS men)) (PP (IN in) (NP (PRP$ their) (JJ prime)))))))
A plan to keep men fat.
( A ( ( plan ( to ( keep ( men fat ) ) ) ) . ) )
(ROOT (S (NP (NNP A)) (VP (VBP plan) (S (VP (TO to) (VP (VB keep) (S (NP (NNS men)) (ADJP (JJ fat))))))) (. .)))