Assertion: mastiff's dog | /r/HasProperty | 10.3 years
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Source sentences:
text: The longest living were black brindle dogs (10.3 years) followed by brindle dogs (10.1 years), grey brindle dogs (9.8 years), fawn dogs (9.0 years), black dogs (9.0 years), grey dogs (9.0 years) and other colour dogs (8.1 years).