Complex sentence: In 2001, he was elected as President of the PCT for the City of Brazzaville and began preparing for the 2002 presidential election, which Sassou Nguesso won without any major competition.
Split into simpler sentences: In 2001, he was elected as President of the PCT for the City of Brazzaville. He was then in charge of the 2002 presidential election, which Sassou Nguesso won without any major competition.