Complex sentence: In 1996, Gainer was appointed by the National Democratic Institution for International Affairs to undertake a two-year mission in Croatia, assisting members of the country's six political parties in establishing a functional democratic system.
Split into simpler sentences: In 1996, Gainer was appointed by the National Democratic Institution for International Affairs to undertake a two-year mission in Croatia. She was responsible for assisting members of the country's six political parties to establish a functional democratic system.