<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x653/54feff6b93ba6-ghk-irobot-roomba-700-series-wp8jzh-s2.jpg>
<http://www.goodhousekeeping.com/home-products/g449/top-home-trends-2012/>