Complex sentence: During the 1980s, as the oil industry began to decline, Dresser's chairman, John Murphy, began to streamline the organization of the company, eliminating its insurance, mining, and construction-equipment divisions.
Split into simpler sentences: During the 1980s, as the oil industry began to decline, Dresser's chairman, John Murphy, began to streamline the organization of the company. Murphy ordered the elimination of the insurance, mining, and construction-equipment divisions.