Assertion: dehydrated gypsum | /r/CreatedBy | heating gypsum
Facets:
value: to temperatures
type: CAUSE
Source sentences:
text: Dehydrated gypsum, created by heating gypsum to temperatures ranging from 330°F to 370°F, is known as “plaster of Paris” because the material used to be mined exclusively from the Montmartre district of Paris.