Complex sentence: Rudolph Rummel estimated that between 100,000 and 200,000 Angolans died when, after Nito Alves's attempted "coup" in 1977, Agostinho Neto ordered the killing of suspected followers and sympathisers of "orthodox communism" inside and outside.
Split into simpler sentences: Rudolph Rummel estimated that between 100,000 and 200,000 Angolans died. After Nito Alves's attempted "coup" in 1977, Agostinho Neto ordered the killing of suspected followers and sympathisers of "orthodox communism" inside and outside.