Assertion: otter | /r/HasProperty | endured for more than 30 million years
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Source sentences:
text: There are five important facts to know about otters: (1) They are believed to be one of the most intelligent non-human species on the planet; (2) There is evidence that they have endured for more than 30 million years; (3) They have been known to create tools; (4) Every continent except Australia and Antarctica has an otter population; and (5)