<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/55004614a644e-guacamole-7-ghv-325-13026011.jpg>
<http://www.goodhousekeeping.com/food-recipes/cooking/tips/g1992/easy-guacamole-recipe/>