id	domain	url
challenge-7	media-2.web.britannica.com	http://media-2.web.britannica.com/eb-media/85/77385004-d9b3790e.gif
challenge-7	media-2.web.britannica.com	http://media-2.web.britannica.com/eb-media/85/77385-004-d9b3790e.gif
challenge-7	afrikaworld.net	http://afrikaworld.net/afrel
challenge-7	lucy.ukc.ac.uk	http://lucy.ukc.ac.uk/era/ancestors/kopytoff.html)