<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/54eb5842b4478_-_christmas-tree-on-car-lgn.jpg>
<http://www.countryliving.com/home-design/decorating-ideas/tips/g1224/pick-the-best-christmas-tree/>