Assertion: chinchilla's problem | /r/CapableOf | become bad
Facets:
value: by the 1980s
type: TEMPORAL
Source sentences:
text: By the 1980s, the problem had become so bad that the vaquita was listed as endangered under the U.S. Endangered Species Act in 1985 and a year later as vulnerable on the International Union for Conservation of Nature (IUCN)