Assertion: calcium oxide | /r/HasProperty | heated to about 2,000 degrees
Facets:
value: by natural gas and combustion air
type: OTHER
value: to form lime
type: PURPOSE
value: fahrenheit
type: OTHER
Source sentences:
text: It is heated to about 2,000 degrees Fahrenheit by natural gas and combustion air to form lime by a process of controlled burning called calcination in which carbon in the limestone is driven off.