Complex sentence: After the Labour Party came to power in 1997, they introduced the back to work New Deal service for those on Jobseeker's Allowance, requiring claimants to attend classes or risk losing their benefit.
Split into simpler sentences: After the Labour Party came to power in 1997, they introduced the back to work New Deal service for those on Jobseeker's Allowance. Claimants of Jobseeker's Allowance are required to attend classes or risk losing their benefit.