<http://schema.org/about>
"The mystery of why the bubbles in the legendary beer Guinness sink as opposed to rise as one might expect has finally been solved \u2014 the secret apparently lies"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/food/beverages/stories/mystery-of-guinness-stout-bubbles-solved>