<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x813/54ff7aab2187e-ghk-young-scientists-club-clifford-bubble-science-s2.jpg>
<http://www.goodhousekeeping.com/childrens-products/toy-reviews/g1373/best-toys-under-20/?src=shelter_footer>