Complex sentence: To improve conditions for elderly persons, supplementary pensions were introduced in 1940, and in 1943, there were further improvements in rates and conditions for those in receipt of supplementary pensions and unemployment assistance.
Split into simpler sentences: To improve conditions for the elderly, supplementary pensions were introduced in 1940. In 1943, there were further improvements in rates and conditions for those in receipt of supplementary pensions and unemployment assistance.