Complex sentence: In October 1938, following the Munich Agreement, Chamberlain reshuffled his Cabinet and appointed Runciman as Lord President of the Council, a post that he held until the outbreak of the Second World War.
Split into simpler sentences: In October 1938, following the Munich Agreement, Chamberlain reshuffled his Cabinet and appointed Runciman as Lord President of the Council. He held that post until the outbreak of the Second World War.