<http://schema.org/about>
"Teens who say they think it's unlikely that they'll live to age 35 are more likely to engage in risky behaviors such as abusing drugs or attempting suicide, acc"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/teens-with-low-life-expectancy-practice-risky-behavior>