( ( Vitamin D ) ( ( may ( reduce ( ( the risk ) ( of osteoporosis ) ) ) ) . ) )
(ROOT (S (NP (NNP Vitamin) (NNP D)) (VP (MD may) (VP (VB reduce) (NP (NP (DT the) (NN risk)) (PP (IN of) (NP (NN osteoporosis)))))) (. .)))
Vitamin D may reduce the risk of osteoporosis.
(ROOT (S (NP (NP (DT A) (NN diet)) (ADJP (JJ rich) (PP (IN in) (NP (NN calcium) (CC and) (NN vitamin) (NNS d))))) (VP (MD may) (VP (VB reduce) (NP (NP (DT the) (NN risk)) (PP (IN of) (NP (NN osteoporosis) (CC and) (JJ related) (NN bone) (NNS fractures)))))) (. .)))