<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/04/16/140416221440_south_korea_ferry_families_464x261_ap.jpg>
<http://www.bbc.com/mundo/ultimas_noticias/2014/04/140415_ultnot_hunde_ferry_corea_del_sur>