<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eaf9b83da2d_-_famous-april-fool-s-day-pranks-mdn.jpg>
<http://www.womansday.com/life/a2403/famous-april-fools-day-pranks-115868/>