<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb043980d7c_-_rare-earths-01-0113-smn.jpg>
<http://www.popularmechanics.com/science/environment/a8592/a-cleaner-better-rare-earths-mine-14977859/?src=rss>