<http://schema.org/about>
"After numerous music bands, such as Radiohead,  took on the fight against climate change and decided to go green(er), more and more festival organisers are also keen on the idea to contribute towards sustainability with their events. A great example is"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/sos-48-a-new-green-music-art-festival-in-spain.html>