Complex sentence: Immediately after the Germans entered the city, Einsatzgruppen and civilian collaborators organized a pogrom against the Jews, some, mostly Ukrainian scholars, argue that this was in retaliation for the NKVD prisoner massacres of approximately 2000 Nakonechnyj Ye.
Split into simpler sentences: Immediately after the Germans entered the city, Einsatzgruppen and civilian collaborators organized a pogrom against the Jews. Some, mostly Ukrainian scholars, argue that this was in retaliation for the NKVD prisoner massacres of approximately 2000 Nakonechnyj Ye.