<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x1001/54ff163942bd3-ghk-popar-construction-machines-book-s2.jpg>
<http://www.goodhousekeeping.com/childrens-products/toy-reviews/g709/toy-fair-trends-2013/>