<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/74366000/jpg/_74366048_m4150474-radiologist_studying_mammograms.jpg>
<http://www.bbc.com/news/health-28688311?postId=120092773>