Complex sentence: In their speeches, Santiago Carillo, Enrico Berlinguer and George Marchais decried aspects of the Soviet political system whilst some other delegates re-affirmed their adherence to the line of the Soviet party.
Split into simpler sentences: In their speeches, Santiago Carillo, Enrico Berlinguer and George Marchais decried aspects of the Soviet political system. Other the other hands, there were also interventions from other delegates whom re-affirmed their adherence to the line of the Soviet party.