<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54cfd63f519b4_-_helium-plant-01-1112-k6viiq-mdn.jpg>
<http://www.popularmechanics.com/science/health/a8289/as-shortage-worsens-we-visit-the-federal-helium-reserve-14720528/?click=pm_latest>