Assertion: booby's parent | /r/CapableOf | deter dominant chick
Facets:
value: from ousting the subordinate one
type: PURPOSE
Source sentences:
text: Blue-footed boobies, in comparison with masked boobies, for example, design steep-sided nests to deter the dominant chick from ousting the subordinate one and when the nests were experimentally flattened, the parents rebuilt them.