<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x430/54cab4ea2f3d3_-_green_build_01_1110-xl.jpg>
<http://www.popularmechanics.com/science/environment/g421/top-7-green-products-from-greenbuild-2010/>