Assertion: orangutan's gestation period | /r/CapableOf | last for nine months
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Source sentences:
text: Their gestation period lasts for nine months, and they do not get pregnant again for up to eight years.
text: Female orangutans have a gestation period that lasts about nine months and when their young is born it wills stay clinging to the mother; belly to belly for nearly four months or longer.
text: After a gestation period that lasts for up to 9 months, the female Bornean Orang-utan gives birth to a single infant which clings onto its mother's fur and is completely dependent on her for up to 10 years.
text: After a gestation period that lasts for around nine months, the female Orang-utan gives birth to a single infant in a special nest built high in the trees.