<http://schema.org/image>
<http://rack.0.mshcdn.com/media/ZgkyMDE1LzA0LzA4LzFjL1NtaWxleXMuMDQ1ZDIuanBnCnAJdGh1bWIJMTIwMHg2MjcjCmUJanBn/35f0dc36/e43/Smileys.jpg>
<http://mashable.com/2013/06/26/missing-emojis/>