<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f65a62c9bbb_-_01-food-pairs-muffin-orange-juice-de-lg.jpg>
<http://www.delish.com/cooking/nutrition/g851/foods-not-to-eat-together/>