<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2016/03/23/160323173806_hounslow_in_west_london_624x351_getty_nocredit.jpg>
<http://www.bbc.com/mundo/noticias/2016/03/160323_economia_sarao_extradicion_wall_street_falseo_bolsas_mr>