<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://esq.h-cdn.co/assets/cm/15/06/320x240/54d3eda7209a5_-_aviation-mysteries-03-0314-lgn.jpg>
<http://www.esquire.com/news-politics/news/g1748/10-unsolved-aviation-mysteries/>