Assertion: smallpox | /r/CapableOf | reach hidatsa
Facets:
value: in the years
type: TEMPORAL
Source sentences:
text: The disease kept spreading into populations that had not been exposed to it; Elizabeth Fenn estimates that in the years 1775-1781, smallpox reached the Comanches, Mandans, Hidatsas, Arikaras, Apaches, Crows, Sioux, Ojibwas, and many other tribes of the North Plains and Northwest Coasts of the U.S. and Canada.