Assertion: terrier's lifespan | /r/HasProperty | around 15 years
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Source sentences:
text: The average lifespan of a Fox Terrier is around 15 years; however, the Kennel Club survey reported a median age at death of 13 years and 2 months.
text: The average lifespan of the Brat is around 15 years, which ranks amongst the longer life expectancies in dogs.