Assertion: captivity's life expectancy | /r/HasProperty | that of those
Facets:
Source sentences:
text: The life expectancy of zoo elephants is half that of those working in Burmese timber camps
text: With a substantial body of scientific evidence about the negative effects of captivity on other wide-ranging carnivores like polar bears and big cats, and with recent research showing that the life expectancy of zoo elephants is half that of those working in Burmese timber camps, David Hancocks, ex-director of Woodland Parks Zoo in Seattle, thinks it's just a matter of time before big changes take place in other zoological institutions.