Assertion: gunpowder | /r/HasProperty | invented in 9th-century china
Facets:
Source sentences:
text: Gunpowder was invented in 9th-century China as one of the Four Great Inventions, and spread throughout most parts of Eurasia by the end of the 13th century.
text: Gunpowder was invented in 9th-century China and spread throughout most parts of Eurasia by the end of the 13th century.