<http://schema.org/description>
"If you use foursquare to check-in to your favorite locations and share those notifications on Facebook, then you're in for a treat.\r\n\r\nFoursquare has announced that your foursquare ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2012/05/14/foursquare-check-ins-are-now-integrated-into-your-facebook-timeline-map/>