Assertion: bat's lifespan | /r/HasProperty | 90-100 days
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Source sentences:
text: Bats, which are related to primates in an evolutionary sense, might be one of the tinier mammals, but their scientific biology is like the larger mammals: have only one young; young is born at 25% of the mother’s weight; lifespan of 34 years; and gestation 90-100 days.