Assertion: pelican's food | /r/CapableOf | grow scarce
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Source sentences:
text: In medieval Europe, it was believed that whenever food grew scarce, mother pelicans would intentionally stab themselves on the breast with their beaks and then use the blood to feed their chicks.
text: In medieval times it was said that, when food grew scarce, the mother penguins would stab themselves in the breast with their beak, and feed blood to the chicks!