Assertion: gypsum | /r/HasProperty | abundant mineral humans
Facets:
Source sentences:
text: Gypsum is an abundant mineral humans have used as a construction material since the times of ancient Egypt.
text: Gypsum is an abundant mineral rock from which you make plaster and commonly found in the earth crust and quarried worlwide.
text: Gypsum is an abundant mineral humans have used as a construction material since the times of ancient Egypt.