Assertion: killer whale's lifespan | /r/HasProperty | around 30 years
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Source sentences:
text: The average lifespan for male Killer Whales is around 30 years but can live up to 60 years old.
text: The average lifespan for males in the wild is 30 years, but some live up to 50–60 years.
text: The average life span of a female orca is about 50 years while the average lifespan of a male orca is around 30 years.