Assertion: calcium carbonate | /r/AtLocation | nature
Facets:
value: frequently
type: TEMPORAL
value: widely
type: DEGREE
Source sentences:
text: Calcium carbonate is a material that is widely found in nature, and is commonly referred to as calcite.
text: Calcium carbonate is frequently found in nature as a component of rocks, corals, pearls, marine organism shells, eggshell and snailshell.