Assertion: calcium | /r/HasProperty | chemical element
Facets:
value: with the symbol
type: OTHER
Source sentences:
text: Calcium is a chemical element with the symbol Ca and atomic number 20.
text: Calcium is a chemical element.
text: Calcium (Ca) , chemical element , one of the alkaline-earth metals of Group 2 (IIa) of the periodic table .
text: Calcium is a mineral or a chemical element that is constantly recycled.