<http://schema.org/image>
<http://rack.2.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzdjLzV1c2VmdWx0b29sLmFBdi5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/532dfcf8/4ee/5-useful-tools-to-track-twitter-unfollowers-8caa5dc8e9.jpg>
<http://mashable.com/2010/08/09/track-twitter-unfollowers/>