Assertion: heron's predator | /r/HasProperty | threat
Facets:
value: to great blue herons
type: TRANSITIVE-OBJECT
Source sentences:
text: What predators are threats to Great Blue Herons?
text: Colonies often form on isolated islands, barrier beaches, and marshy hummocks, which are safe from terrestrial predators (though aerial predators can still be a danger).
text: What predators are threats to Great Blue Herons?