Complex sentence: The killings began on 13 October 1991 and continued until late October, perpetrated by the Croatian Serb SAO Krajina police and generally targeted ethnic Croat civilians in Široka Kula.
Split into simpler sentences: The killings began on 13 October 1991 and continued until late October. They were perpetrated by the Croatian Serb SAO Krajina police and generally targeted ethnic Croat civilians in Široka Kula.