<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/15/09/980x741/gallery_1425054586-maine_lights.jpeg>
<http://www.popularmechanics.com/culture/g1902/here-are-some-ufo-photos-from-project-bluebook/>