id	domain	url
challenge-183	www.ncjrs.gov	http://www.ncjrs.gov/app/publications/abstract
challenge-183	media-2.web.britannica.com	http://media-2.web.britannica.com/eb-media/85/77385004-d9b3790e.gif
challenge-183	media-2.web.britannica.com	http://media-2.web.britannica.com/eb-media/85/77385-004-d9b3790e.gif
challenge-183	afrikaworld.net	http://afrikaworld.net/afrel
challenge-183	lucy.ukc.ac.uk	http://lucy.ukc.ac.uk/era/ancestors/kopytoff.html)