<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2016/01/15/160115234235_nicolas_maduro_624x351_epa_nocredit.jpg>
<http://www.bbc.com/mundo/noticias/2016/01/160118_paises_mayore_sanciones_economicas_dgm>