Assertion: killer whale | /r/CapableOf | attack either humpback calves
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Source sentences:
text: There is also evidence that humpback whales will defend against or attack killer whales who are attacking either humpback calves or juveniles as well as members of other species.
text: There is evidence that humpback whales will defend against or attack killer whales who are attacking either humpback calves or juveniles as well as members of other species.