( Osteoporosis ( ( can ( be ( due ( to ( calcium deficiency ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Osteoporosis)) (VP (MD can) (VP (VB be) (ADJP (JJ due) (PP (TO to) (NP (NN calcium) (NN deficiency)))))) (. .)))
Osteoporosis can be due to calcium deficiency.
(ROOT (S (NP (RB Too) (JJ little) (NN calcium)) (VP (MD can) (VP (VB cause) (NP (DT the) (NN disease) (NN osteoporosis)))) (. .)))