<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb24230c173_-_bestapps-09-1213-lgn.jpg>
<http://www.popularmechanics.com/technology/apps/reviews/g1370/the-20-best-apps-of-2013-16278756/>