Assertion: great black backed gull | /r/HasProperty | predator
Facets:
value: in some biomes
type: LOCATION
value: at the top
type: LOCATION
Source sentences:
text: Black-backed gulls are both predators and scavengers, and have been recorded catching and consuming a wide range of marine and terrestrial invertebrates, fish, small mammals, birds and their eggs and chicks.
text: In some biomes, where large gulls are absent, great black-backed gulls may be considered predators at the top.