<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/64232000/jpg/_64232671_c0051366-little_brown_bat_in_flight_echolocating-spl.jpg>
<http://www.bbc.com/news/health-20392050>