id	domain	url
cet-5401	www.aidic.it	www.aidic.it/cet
cet-5401	en.wikipedia.org	http://en.wikipedia.org/wiki/nitrate
cet-5401	en.wikipedia.org	http://en.wikipedia.org/wiki/phosphate
cet-5401	en.wikipedia.org	http://en.wikipedia.org/wiki/fertilizer
cet-5401	en.wikipedia.org	http://en.wikipedia.org/wiki/sewage