Assertion: bat | /r/HasProperty | one of the tinier mammals
Facets:
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.