<http://schema.org/about>
"From November 28 until December 2 the Buenos Aires Botanical Garden will host Sustentable '08, the first edition of an annual festival entirely dedicated to sustainable design."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/sustainable-design-festival-in-buenos-aires-this-weekend.html>