<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54ffce05ec514-carbon20220in20120oven20rack20and20grill20cleaner.jpg>
<http://www.goodhousekeeping.com/institute/a24122/products-that-clean-while-you-sleep/?src=shelter_footer>