Assertion: tiger's lifespan | /r/HasProperty | 16 to 18 years
Facets:
Source sentences:
text: The lifespan of Siberian tigers in the wild is 16 to 18 years, but can reach 25 years in captivity.
text: In captivity tigers have been known to live up to 26 years old, although a typical captive lifespan is 16 to 18 years.