Assertion: gunpowder | /r/HasProperty | a nitrate salt
Facets:
value: from the earliest times
type: TEMPORAL
value: from the earliest period
type: TEMPORAL
Source sentences:
text: From the earliest period, gunpowder has been composed of a nitrate salt, sulfur, and carbonaceous matter.
text: From the earliest times, gunpowder has been composed of a nitrate salt, sulfur, and carbonaceous matter.