Assertion: glass | /r/MadeOf | three main materials
Facets:
Source sentences:
text: Such glasses are made from three main materials—sand (silicon dioxide, or SiO 2 ), limestone (calcium carbonate, or CaCO 3 ), and sodium carbonate
text: Such glasses are made from three main materials—sand (silicon dioxide, or SiO 2 ), limestone (calcium carbonate, or CaCO 3 ), and sodium carbonate