Assertion: pyrite | /r/HasProperty | major source of sulfur
Facets:
Source sentences:
text: Pyrite continues to be mined worldwide and is a major source of sulfur, the basic constituent of sulfuric acid.
text: Pyrite is a major source of iron and is one of the most abundant of the sulfur minerals.
text: Pyrite is a major source of sulfur, the basic constituent of sulfuric acid, which is one of the most important industrial chemicals, and made in greater amounts each year than any other manufactured chemical.