Assertion: black vulture | /r/HasProperty | blue-listed
Facets:
value: in 1972
type: TEMPORAL
value: for two reasons
type: CAUSE
Source sentences:
text: The Black Vulture is very common but in 1972 it was blue-listed for two reasons: a decrease in numbers of suitable tree cavities for nest sites due to forest fire control, and widespread eggshell thinning from pesticides such as DDT.