<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/54170000/jpg/_54170927_muybridge_buffalo_galloping304x171.jpg>
<http://www.bbc.co.uk/news/world-us-canada-14191249>