<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/480x552/54fec4e117143-ghk-woman-drinking-water-mpffor-xl.jpg>
<http://www.goodhousekeeping.com/health-products/g684/water-filters/?src=shelter_footer>