<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/480x360/54f0da0f2fe42_-_01-the-clas-ohlson-birdhouse-lgn-83357954.jpg>
<http://www.countryliving.com/gardening/garden-ideas/g1762/amazing-birdhouses/>