Assertion: gunpowder | /r/HasProperty | 75% potassium nitrate
Facets:
Source sentences:
text: The most common gunpowder, black gunpowder, is composed of 75% potassium nitrate (KNO3), 15% carbon and 10% sulfur.
text: Gunpowder is comprised of 75% potassium nitrate, 15% charcoal and 10% sulfur.