Complex sentence: Allan C. Golston, president of the United States Program at the Bill & Melinda Gates Foundation, leads the foundation's efforts to reduce inequities and increase access to opportunities for low-income and disadvantaged Americans.
Split into simpler sentences: Allan C. Golston is president of the United States Program at the Bill & Melinda Gates Foundation. He is in change of the foundation's efforts to reduce inequities and increase access to opportunities for low-income and disadvantaged Americans.