Assertion: nilgai's population | /r/CapableOf | undergo drastic decline of around 80%
Facets:
value: from about 119,000 individuals
type: OTHER
Source sentences:
text: A study of the factors influencing wildebeest populations in the Maasai Mara ecosystem revealed that the populations had undergone a drastic decline of around 80% from about 119,000 individuals in 1977 to around 22,000 twenty years later.