<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://esq.h-cdn.co/assets/cm/15/07/54dae46bac1cb_-_sir-isaac-newton-0709-lg-3470850.jpg>
<http://www.esquire.com/news-politics/news/a6141/famous-world-explorers-072709/>