Assertion: crested gibbon | /r/HasProperty | one of the rarest monkeys
Facets:
value: with less than 30 alive
type: OTHER
Source sentences:
text: Some are relatively abundant--such as the bornean gibbon, of which there are hundreds of thousands estimated worldwide--while the hainan black crested gibbon is one of the rarest monkeys, with less than 30 alive in the world.