<http://schema.org/interactionType>
"http://schema.org/CommentAction"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/09/02/shazam-for-ios-now-lets-your-twitter-followers-preview-songs-in-tweet-when-you-share-a-tagged-song/>