<http://schema.org/interactionType>
"http://schema.org/CommentAction"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/insider/2013/08/28/automattic-takes-on-storify-with-release-of-wordpress-media-explorer-tool-bringing-in-tweets-and-youtube-content/>