Assertion: tern's migration | /r/HasProperty | dangerous
Facets:
value: extremely
type: DEGREE
value: for birds
type: TRANSITIVE-OBJECT
Source sentences:
text: Migration can be extremely dangerous for birds, and many don’t often make it back to their starting point.
text: It’s a balancing act, though, since migration itself is dangerous and increases a bird’s risk of death (see Table).