<http://schema.org/image>
<http://rack.2.mshcdn.com/media/ZgkyMDEyLzEyLzA0Lzg0LzVtdXN0dHJ5dHVtLmFWYS5naWYKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/7530edaa/8c4/5-must-try-tumblr-extras-053466d43b.jpg>
<http://mashable.com/2009/03/27/tumblr-extras/>