<http://schema.org/image>
<http://rack.1.mshcdn.com/media/ZgkyMDEzLzAzLzAxLzRkL0dyb3Vwb24uNzAwZmUucG5nCnAJdGh1bWIJMTIwMHg2MjcjCmUJanBn/616889b7/980/Groupon.jpg>
<http://mashable.com/2013/03/01/groupon-ceo-chart/>