<http://schema.org/image>
<http://rack.0.mshcdn.com/media/ZgkyMDEyLzEyLzA0Lzk3L3RoZTEwdXNlcnN5LmJkRy5wbmcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/b97d0de2/c3a/the-10-users-you-ll-meet-on-twitter-8f8b817857.jpg>
<http://mashable.com/2009/01/01/twitter-user-types/>