<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/980x1374/54ebd1a17f9c9_-_10-mackerel-table-s2.jpg>
<http://www.womansday.com/health-fitness/nutrition/advice/g1446/how-to-focus/>