Assertion: calcium | /r/HasProperty | needed for strong bones
Facets:
Source sentences:
text: Two nutrients in particular, calcium and vitamin D, are needed for strong bones.
text: Most people know that calcium is needed for strong bones, but it's also needed to help blood vessels and muscles contract and expand, to send messages through the nervous system, and to secrete hormones and enzymes.
text: Most people know that calcium is needed for strong bones, but it's also needed to help blood vessels and muscles contract and expand, to send messages through the nervous system, and to secrete hormones and enzymes.