<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/480x552/54eba817cc097_-_in-praise-of-seltzer-cleaning-tiles-xl.jpg>
<http://www.womansday.com/home/organizing-cleaning/g891/uses-of-seltzer-water/?src=shelter_footer>