<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x1470/54ff1677e5ca6-ghk-cleaning-your-cleaners-washing-machine-2-s2.jpg>
<http://www.goodhousekeeping.com/home/cleaning/tips/g696/clean-your-cleaners/?click=gtkb>