Assertion: gibbon's number | /r/CapableOf | drop in 1950
Facets:
value: from 2,000
type: OTHER
value: to 30 in the 1980s
type: TEMPORAL
Source sentences:
text: Hunting and loss of their habitat to rubber plantations and logging saw numbers of this species drop from 2,000 in the 1950s to just 30 in the 1980s.