Assertion: zircon | /r/HasProperty | popular
Facets:
value: during the fourteenth century
type: TEMPORAL
Source sentences:
text: During the Fourteenth century, zircon was popular as a safeguard against the Black Death, the great plague that wiped out one quarter of the population of Europe.
text: Zircon is a popular gem because it is available in a variety of pleasing colors.