Complex sentence: It is the third largest city in the country, following the capital Kinshasa and second largest city Lubumbashi but ahead of Kisangani and Kananga, though the exact population isn't known.
Split into simpler sentences: It is the third largest city in the country, following the capital Kinshasa and second largest city Lubumbashi but ahead of Kisangani and Kananga. The city is the DRC's third-largest, though the exact population isn't known.