<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54cab4ebcbfee_-_green_build_07_1110-xl-73745024.jpg>
<http://www.popularmechanics.com/science/environment/g421/top-7-green-products-from-greenbuild-2010/>