Complex sentence: A convention was held in December 1992 in which delegates declared themselves to be the continuation of the Communist Party (thus the meeting was titled the 30th CPC Convention) and rejected the changes instituted by Hewison by reaffirming the CPC as a Marxist-Leninist organization.
Split into simpler sentences: A convention was held in December 1992 in which delegates declared themselves to be the continuation of the Communist Party (thus the meeting was titled the 30th CPC Convention). Delegates rejected the changes instituted by Hewison by reaffirming the CPC as a Marxist-Leninist organization.