Complex sentence: He served as chairman, Committee on Pensions (Sixty-seventh and Sixty-eighth Congresses) engaged in the newspaper business at Washington, D.C., and subsequently returned to Socorro and resumed his former business interests until his death in Colorado Springs, Colorado.
Split into simpler sentences: He served as chairman, Committee on Pensions (Sixty-seventh and Sixty-eighth Congresses). Bursum subsequently returned to Socorro and resumed his former business interests until his death in Colorado Springs, Colorado.