Assertion: whale's gestation period | /r/HasProperty | about 10 to 12 months
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Source sentences:
text: The gestation period of the blue whale is about 10 to 12 months.
text: Science suggests that the gestation period of the blue whales is between 10 to 12 months.
text: The best available science suggests the gestation period is approximately 10 to 12 months, and that blue whale calves are nursed for about 6 to 7 months.