<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x1316/54ff1678852e0-ghk-cleaning-your-cleaners-broom-s2.jpg>
<http://www.goodhousekeeping.com/home/cleaning/tips/g696/clean-your-cleaners/?link=clean-cleaners&dom=yah_ca&src=syn&con=blog_gh&mag=ghk>