<http://schema.org/description>
"Facebook is now testing a retweet like feature with some users, allowing people to pass along links that have been shared on Facebook.\r\n\r\nNot everyone has the ability at the moment, ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2010/01/16/retweet-facebook/>