<http://schema.org/description>
"Foursquare today updated its Android and iOS apps with a very interesting feature addition: the ability to check-in your friends. You can download the new apps now directly from Google ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2013/06/25/foursquare-for-ios-now-lets-you-check-in-your-friends-but-only-with-their-permission/?fromcat=all>