<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/320x426/55004baec4cc9-white-beans-potassium-nbw1co-lgn.jpg>
<http://www.goodhousekeeping.com/health/diet-nutrition/g2065/potassium-superfoods/?src=shelter_footer>