Assertion: skim milk's calcium | /r/HasProperty | needed by the body
Facets:
value: for relaxation, nervous system function
type: PURPOSE
value: for muscle contraction
type: PURPOSE
value: for blood clotting
type: PURPOSE
Source sentences:
text: Calcium is a mineral found mainly in bones and teeth but is also needed by the body for muscle contraction and relaxation, nervous system function, blood clotting, and to help maintain a regular heartbeat.