<http://schema.org/about>
"Regular exercise is a known indicator of good health, but did you know that just a 40 minutes walk once a day could have astonishing health benefits?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/8-astonishing-benefits-of-walking?page=1>