<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/10/320x426/54f5f91720de8_-_1-earth-with-shadow-lgn.jpg>
<http://www.womansday.com/home/organizing-cleaning/tips/g826/celebrate-earth-day-2012/>