<http://schema.org/about>
"Rather than rolling your eyes when it's your turn to bow your head and give thanks, try being grateful. The result just might be good for you. From boosting you"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/research-shows-being-thankful-is-good-for-your-health>