<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://edc.h-cdn.co/assets/cm/15/05/480x384/54c9398747417_-_eco-friendly-met-eco-mh0509-1.jpg>
<http://www.elledecor.com/design-decorate/house-interiors/g1939/eco-logical/>