<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/160x213/54eb7e7e7b091_-_sandwiches-mdn.jpg>
<http://www.womansday.com/health-fitness/nutrition/g106/10-ways-to-cut-100-calories-113876/>