<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/07/05/140705124905_police-horse_624x351_isna.jpg>
<http://www.bbc.com/persian/iran/2014/07/140705_police_horses.shtml>