<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/58203000/jpg/_58203319_m2300194-coloured_x-ray_of_hip_fracture_due_to_osteoporosis-spl.jpg>
<http://www.bbc.co.uk/news/health-16808621>