<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0e7d9063af_-_picnic-table-04-0511-mdn.jpg>
<http://www.popularmechanics.com/home/how-to-plans/how-to/a6609/build-the-perfect-picnic-table/>