<http://schema.org/image>
<http://rack.0.mshcdn.com/media/ZgkyMDEyLzEyLzA0L2Y5L2ZhY2Vib29rY2hhLmRNNC5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/c09c786d/e99/facebook-chat-for-groups-clobby-628a0ab5cb.jpg>
<http://mashable.com/2010/05/02/facebook-group-chat/>