<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/05/18/140518015501_sp_mers_304x171_reuters.jpg>
<http://www.bbc.com/mundo/ultimas_noticias/2014/05/140517_ultnot_eeuu_tercer_caso_mers_en.shtml>