<http://schema.org/description>
"Earlier today (yesterday for those in the western hemisphere) we discovered that Facebook status updates have started to include links for hashtags and usernames. The exact reason behind ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2012/06/08/twitter-yes-weve-added-photos-hashtags-usernames-and-more-to-our-facebook-integration/>