<http://schema.org/interactionType>
"http://schema.org/CommentAction"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2012/09/25/great-idea-notfound-org-turns-website-error-pages-ads-help-find-missing-children/?awesm=tnw.to_i5JG>