Assertion: black footed ferret | /r/AtLocation | their former range
Facets:
value: by the mid-1900s
type: TEMPORAL
Source sentences:
text: By the mid-1900s, the black-footed ferret was found only in small pockets in their former range and although a managed breeding program was attempted in the 1970s, it was unsuccessful and was assumed that the black-footed ferrets were lost.