Complex sentence: Rwandan President Habyarimana was assassinated in 1994; it is likely Hutu extremists carried out the attack, but some sources allege Kagame was responsible; the Genocide followed, in which Hutu extremists killed an estimated 500,000 to 1 million Tutsi and moderate Hutu.
Split into simpler sentences: Rwandan President Habyarimana was assassinated in 1994, probably by Hutu extremists; some sources allege Kagame was responsible. The Genocide followed, in which Hutu extremists killed an estimated 500,000 to 1 million Tutsi and moderate Hutu.