<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzA0L2J5dGhlbnVtYmVyLmJvcS5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/4e40e06b/db8/by-the-numbers-facebook-vs-the-united-states-infographic--2437e718a9.jpg>
<http://mashable.com/2010/04/05/facebook-us-infographic/>