( ( Too ( little calcium ) ) ( ( can ( cause osteoporosis ) ) . ) )
(ROOT (S (NP (RB Too) (JJ little) (NN calcium)) (VP (MD can) (VP (VB cause) (NP (NNS osteoporosis)))) (. .)))
Too little calcium can cause osteoporosis .
(ROOT (S (NP (RB Too) (JJ little) (NN calcium)) (VP (MD can) (VP (VB cause) (NP (DT the) (NN disease) (NN osteoporosis)))) (. .)))