Complex sentence: In 1931, Black was asked by the government to assume chairmanship of the Saskatchewan Relief Commission, which in its first year alone, distributed relief to 305,000 people, close to one-third of Saskatchewan's population.
Split into simpler sentences: In 1931, Black was asked by the government to assume chairmanship of the Saskatchewan Relief Commission. In its first year alone, the Commission distributed relief to 305,000 people, close to one-third of Saskatchewan's population.