<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/980x551/54ebbb7d4504e_-_5-fridge-leftovers.jpg>
<http://www.womansday.com/health-fitness/womens-health/advice/g1203/food-safety-tips/>