Assertion: raven's nest | /r/HasProperty | threatened
Facets:
value: directly
type: MANNER
Source sentences:
text: Those same birds may also use their talons for defense when they are under attack themselves, or when their mate or nest is threatened.
text: In addition to its song, the American robin has a number of calls used for communicating specific information, such as when a ground predator approaches and when a nest or another American robin is being directly threatened.