<http://schema.org/description>
"?I?m not trashing cross-sectional research, but if you want to see how people change as they get older, you have to measure the same individuals over time.?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2016/01/14/what-mid-life-crisis-recent-study-suggests-it-could-be-a-myth/21297308/>