<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://esq.h-cdn.co/assets/cm/15/05/54cbfbe3e1748_-_esq-00-hardest-puzzle-ever-logo-060111-th2.jpg>
<http://www.esquire.com/news-politics/a10023/hardest-puzzle-ever-ipad-app/>