Assertion: calcium carbonate | /r/HasProperty | either chalk
Facets:
Source sentences:
text: Calcium carbonate is widely used as an extender in paints, in particular matte emulsion paint where typically 30% by weight of the paint is either chalk or marble.
text: Calcium carbonate is a widely available natural inorganic compound, also known as limestone, chalk or marble.
text: Calcium carbonate is widely used as an extender in paints, in particular matte emulsion paint where typically 30% by weight of the paint is either chalk or marble.