<http://schema.org/about>
"While the cause of Parkinson's remains unknown, it can be treated. Here's the run-down on Parkinson's facts."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/parkinsons-disease-what-we-know-and-what-we-dont>