<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/InteractionCounter>
<http://thenextweb.com/apps/2013/06/03/citysocialising-goes-mobile-and-becomes-citysocializer-helping-you-tap-social-scenes-whereever-you-roam/i-28/>