<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/160x213/54eb87cf9b4d9_-_on-the-go-walk-the-walk-mdn.jpg>
<http://www.womansday.com/life/g302/its-easy-being-green-1498/>