<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzlmL2hvd2JpZ2lzdGhlLmFTdy5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/e9891ec9/95c/how-big-is-the-web-how-fast-is-it-growing--cfbd4dcd61.jpg>
<http://mashable.com/2011/06/19/how-many-websites/>