Assertion: great black backed gull | /r/CapableOf | eat adults of other birds
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Source sentences:
text: Great Black-backed Gulls eat eggs, chicks, and adults of other birds, including Atlantic Puffins, Common Murres, Herring Gulls, Common Terns, Roseate Terns, Manx Shearwaters, Horned Grebes, and migrant songbirds.