<http://schema.org/description>
"Foursquare has started rolling out ads to users immediately after they check in to a certain location as part of a push on \u00A0increasing revenues through better targeted ads.\r\n\r\nAccording ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/07/16/all-aboard-foursquare-rolls-out-post-check-in-ads-captain-morgan-signs-up-to-be-one-of-the-first/>