<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/10/480x240/54f5fdc6ecb15_-_01-dog-and-cat-nuzzling-lgn-50635105.jpg>
<http://www.womansday.com/life/pet-care/g1227/pet-friends/>