Complex sentence: The Administration on Aging is an agency of the United States Department of Health and Human Services and conducts statistical activities in support of the research, analysis, and evaluation of programs to meet the needs of an aging population.
Split into simpler sentences: The Administration on Aging (AoA) is an agency of the United States Department of Health and Human Services. It conducts statistical activities in support of the research, analysis, and evaluation of programs to meet the needs of an aging population.