Assertion: elephant's population | /r/HasProperty | declined by at least 50 percent
Facets:
value: over the last three elephant generations
type: TEMPORAL
Source sentences:
text: Since 1986, the Asian elephant has been listed as Endangered on the IUCN Red List, as the population has declined by at least 50 percent over the last three elephant generations, which is about 60–75 years.