Assertion: crane's population | /r/CapableOf | grow to about 600 individuals
Facets:
value: thanks to intensive conservation efforts
type: CAUSE
value: in 2011
type: TEMPORAL
Source sentences:
text: Thanks to intensive conservation efforts, its population has grown from a low of 21 - 22 in 1941 to about 600 individuals in 2011 (with around 160 of these in captivity).