<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2016/02/24/160224155148_pareja_virtual_624x351_invisiblegirldfriend_nocredit.jpg>
<http://www.bbc.com/mundo/noticias/2016/02/160224_tecnologia_invisible_friend_novia_de_pago_il>