This is a package to determine contacts of the types on the definite
web site with commercial advertisments. I have had the real practical results on site aviso.ua This is the site for the Ukrainian estate market.
Some sites has a well-organized structure ( for rubrics and phone numbers ).
It allows to capture and parse all advertisments, and arrange all ads by frequency repetition of advertisers. After that we have a report where all advertisers sorted by repetition criteria. Around 99 times out of 100 the real estate owner stores his/her ads in one or maximum in three rubrics. It allows to separate all ads by owner - not-owner status.