<http://schema.org/image>
<http://rack.2.mshcdn.com/media/ZgkyMDEyLzEyLzA0L2JhL2ZhY2Vib29rbGlrLmFFby5wbmcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/ff8df5b8/1de/facebook-likes-world-domination-754385b451.jpg>
<http://mashable.com/2010/04/19/facebook-like-launch/>