<http://schema.org/description>
"Last month we reported that RunKeeper was rolling out a slew of new features, including Facebook integration and leaderboards. This meant that users could now see which of their existing ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2012/11/20/runkeepers-android-app-gets-leaderboards-facebook-integration-and-in-app-messaging/>