Assertion: belladonna's property | /r/ObjectUse | used by many south american cultures
Facets:
value: prior to european contact
type: TEMPORAL
Source sentences:
text: The febrifugal properties of bark from trees now known to be in the genus Cinchona were used by many South American cultures prior to European contact, but malaria is an Old World disease that was introduced into the Americas by Europeans only after 1492.