<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/2013/06/04/130604111402_newborn_finland_464x261_millakontkanen.jpg>
<http://www.bbc.com/mundo/noticias/2013/06/130604_salud_recien_nacidos_cajas_carton_gtg.shtml>