Assertion: butterfly's egg | /r/CapableOf | take 4 to 6 days
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Source sentences:
text: Butterflies of the first generation, reared in captivity in the Emei mountain study, completed their life cycle in 45 to 54 days, with eggs taking 4 to 6 days, caterpillars 21 to 36 days and pupation 10 to 15 days.