<http://schema.org/about>
"This week marks Carnival of the Green #215, and it's being hosted by Project Earth, a blog for environmental information and discussion, but also one for curriculum ideas by and for high school teachers and students."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/about-treehugger/project-earth-hosts-carnival-of-the-green.html>