Assertion: mountain gorilla's number | /r/CapableOf | increase over past 30 years
Facets:
value: gradually
type: MANNER
Source sentences:
text: Instead, today, due to the intensive protection efforts Fossey initiated, mountain gorillas have reached a new historic milestone: their numbers have gradually increased over the past 30 years, and are up from 240 to 604, based on the latest census.