Assertion: drought | /r/DefinedAs | period
Facets:
value: in the united states
type: LOCATION
Source sentences:
text: Drought is defined as a period in which a region has a deficit in its water supply.
text: In the United States—most of which has a temperate, humid climate—drought is defined as a period at least twenty-one days long during which rainfall over an extensive area is less than 30 percent of average.