Assertion: petrel's head | /r/ObjectUse | used as the emblem of the cape horners
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Source sentences:
text: The head of an albatross being caught with a hook is used as the emblem of the Cape Horners, i.e. sailors who have rounded Cape Horn on freighters under sail; captains of such ships even received themselves the title "albatrosses" in the Cape Horners' organisation.