Complex sentence: Since entering the House of Lords as a Cross Bencher in 1992, Rix has campaigned ceaselessly on any legislation affecting people with a learning disability and much has been achieved, but much remains to be done.
Split into simpler sentences: Since entering the House of Lords as a Cross Bencher in 1992, Rix has campaigned ceaselessly on any legislation affecting people with a learning disability. He recognises that much has been achieved, but much remains to be done.