How to web scrap and process data?

Hi Community. I am new to rapidminer.

I'm trying to scrape  Income tax rates from https://www.gov.uk/government/publications/rates-and-allowances-income-tax/income-tax-rates-and-allowances-current-and-past#tax-rates-and-bands into a table format containing all the various rates on this page.

I want guidance on which operators should I use? I used get page and gives me the entire script for the page? How do I define which tags I am looking for? Clean the html format which i get as a result of get page operator?

please guide me. 

Thanks.