<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/480x552/54eba05b8a45f_-_flight-of-stairs-xl.jpg>
<http://www.womansday.com/life/pet-care/g766/dog-anxiety-treatment/>