Complex sentence: Lawrence then served for a time as president of the local Industrial Union Council and subsequently regained his seat on the Board of Control and kept it for six years until he was elected the first Labour mayor of Hamilton in 1944.
Split into simpler sentences: Lawrence then served for a time as president of the local Industrial Union Council, and subsequently regained his seat on the Board of Control and kept it for six years. He was elected the first Labour mayor of Hamilton in 1944.