Assertion: rhino's number | /r/HasProperty | dropped to around 15,000
Facets:
value: in 1981
type: TEMPORAL
Source sentences:
text: In the 1960s an estimated 70,000 black rhinos were found in Africa and in 1981 the numbers had dropped to around 15,000, and only twelve years later, slightly more than 2000 of the population remained.