<http://schema.org/about>
"Stress can cause digestive issues, as anyone who has ever experienced butterflies in their stomach knows. Now, new research finds that emotional and psychologic"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/research-innovations/stories/emotional-trauma-can-cause-irritable-bowel-syndrome>