<http://schema.org/description>
"Twitter revealed on Monday that it is making its promoted account ads on iOS and Android available to all advertisers.\r\n\r\n\r\n\r\nThe company said it has completed a successful beta with ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2013/12/16/twitter-opens-mobile-timeline-promoted-account-campaigns-advertisers/>