Complex sentence: American Citizens Abroad (ACA) is a non-profit, non-partisan advocacy organization headquartered in Geneva, Switzerland, working on behalf of the estimated three to six million United States citizens living outside the U.S., who have no designated governmental focal point in Washington.
Split into simpler sentences: American Citizens Abroad (ACA) is a non-profit, non-partisan advocacy organization headquartered in Geneva, Switzerland. It works on behalf of the estimated three-to-six million United States citizens living outside the country who have no designated governmental focal point in Washington.