Assertion: bison's population | /r/CapableOf | dwindle to less than 1,000
Facets:
value: by 1889
type: TEMPORAL
Source sentences:
text: It's estimated that 20 to 30 million bison once dominated the North American landscape, but habitat loss and unregulated shooting caused the population to dwindle to less than 1,000 by 1889.