<http://schema.org/image>
<http://static1.squarespace.com/static/5303cdc2e4b01fb736d82734/t/53048fade4b0f73a9b7a9060/1477055725002/>
<http://screenful.com/blog/2014/11/26/setting-up-an-information-radiator-part-2-tracking-metrics-of-your-trello-board>