<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/08/20/140820111433_john_smith_white_black_304x171_thinkstock.jpg>
<http://www.bbc.com/mundo/noticias/2014/08/140820_juan_perez_internet_vert_cap_mz.shtml>