<http://schema.org/description>
"In a bid to expand its user base, social media giant Facebook has announced it will begin displaying ads to web users who are not members of its social net"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.gizbot.com/social-media/news/facebook-to-track-non-users-around-the-internet-032992.html>