Assertion: variola virus | /r/CapableOf | have arisen by scholar
Facets:
value: prior to that discovery
type: TEMPORAL
Source sentences:
text: Prior to that discovery, the disease had been thought by some scholars to have arisen among settled agricultural populations in Mesopotamia as early as the 5th millennium bce and in the Nile River valley in the 3rd millennium bce, though evidence for those events was lacking.