Complex sentence: United States relations are international relations between Cameroon and the United States, the relations are close, although from time to time they have been affected by concerns over human rights abuses and the pace of political and economic liberalization.
Split into simpler sentences: United States relations are international relations between Cameroon and the United States. The relations are close, although from time to time they have been affected by concerns over human rights abuses and the pace of political and economic liberalization.