Complex sentence: Dominis was married to Queen Liliuokalani, the last reigning monarch of Hawaii before being overthrown by the Committee of Safety, a group composed of American and European businessmen who sought to insure Western interests in the region.
Split into simpler sentences: Dominis was married to Queen Liliuokalani, the last reigning monarch of Hawaii. She was overthrown by the Committee of Safety, a group composed of American and European businessmen who sought to insure Western interests in the region.