<http://schema.org/about>
"Folks, from time to time we are in need of some basic demographics on TH readers.  Yes, this is mostly for advertising - but getting this info also helps guide us in our selection of posts and other TH endeavors (like the awsomely wonderful TreeHugger"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/instant-survey-all-about-you-sort-of.html>