<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb237e5f700_-_healthy-home-04-1213-de.jpg>
<http://www.popularmechanics.com/technology/gadgets/reviews/g1366/5-gifts-for-a-happier-healthier-home-this-holiday/>