<http://schema.org/about>
"Tired? Depressed? Nutrient deficiency might be to blame. You might not be getting the right amount of these vitamins &amp; minerals."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/7-nutrient-deficiencies-that-can-make-you-sick>