<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x1216/54ff1b50bd38d-ghk-history-at-home-coffee-percolator-s2.jpg>
<http://www.goodhousekeeping.com/food-recipes/g754/history-coffee/?src=shelter_footer>