<http://schema.org/image>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2013/03/1415773_13945768-520x245.jpg>
<http://thenextweb.com/google/2013/12/06/google-says-91-4-authenticated-non-spam-emails-sent-gmail-users-now-using-antiphishing-standards/>