<http://schema.org/about>
"Water is one of the most undervalued resources we have. Especially in the developed world, we pay a fraction of the true cost of water in order to have the required resource run from our taps. But really, a barrel of"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-water/more-expensive-water-experts-say-a-price-hike-is-a-must.html>