Complex sentence: She served as Prime Minister of Rwanda from 18 July 1993 until her assassination on 7 April 1994, during the opening stages of the Rwandan Genocide.
Split into simpler sentences: She served as Prime Minister of Rwanda from 18 July 1993 until her death on 7 April 1994. Her term was ended when she was assassinated during the opening stages of the Rwandan Genocide.