<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54ffdcf4f16bf-ghk-blog-woman-smiling-white-teeth-325.jpg>
<http://www.goodhousekeeping.com/institute/a24639/best-teeth-whiteners/?src=shelter_footer>