Assertion: gunpowder | /r/HasProperty | invented
Facets:
Source sentences:
text: Although gunpowder was first invented and described in China, Bacon was the first in Europe to record its formula.
text: Gunpowder had to be invented first, but even here gunpowder is not one substance, but many, of differing properties.
text: Gunpowder was invented, documented, and used in China where the Chinese military forces used gunpowder-based weapons technology (i.e. rockets, guns, cannon), and explosives (i.e. grenades and different types of bombs) against the Mongols when the Mongols attempted to invade and breach the Chinese city fortifications on the northern borders of China.