I did a probabilistic approach before:- http://edinburghhacklab.com/2013/09/probabalistic-scraping-of-plain-text-tables/ http://edinburghhacklab.com/2013/09/pro

I did a probabilistic approach before:- http://edinburghhacklab.com/2013/09/probabalistic-scraping-of-plain-text-tables/ http://edinburghhacklab.com/2013/09/probabalistic-scraping-o... Companies like skyscanner employ loads of people to keep all the scrapers fresh.