Assertion: emperor penguin's plumage | /r/CapableOf | take up to two months
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Source sentences:
text: From early November, chicks begin moulting into juvenile plumage, which takes up to two months and is usually not completed by the time they leave the colony.
text: From early November, chicks begin moulting into juvenile plumage, which takes up to two months and is often not completed by the time they leave the colony; adults cease feeding them during this time.