Assertion: cactus wren | /r/CapableOf | mob intruder
Facets:
value: to drive them
type: PURPOSE
Source sentences:
text: The nest is usually positioned in the narrow fork of a cactus where the plant's spines provide an extra deterrent to potential predators, though cactus wrens are aggressive when guarding their nesting sites and will mob intruders to drive them away.