<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://hbu.h-cdn.co/assets/cm/15/04/980x607/54c146ad9143a_-_hbx030114tech05-s2.jpg>
<http://www.housebeautiful.com/shopping/home-gadgets/tips/g1683/pet-technology/>