<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eaf7621438e_-_04-selecting-the-wrong-dog-food.jpg>
<http://www.womansday.com/life/pet-care/a2372/10-common-mistakes-dog-owners-make-116533/>