<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eae5ca51085_-_04-floppy-discs-retired-technologies.jpg>
<http://www.womansday.com/life/a2106/8-revolutionary-technologiesnow-forgotten-113265/>