Complex sentence: Guo Jinlong, the Mayor of Beijing, handed over the Olympic flag to the Mayor of London, Boris Johnson, and there was a performance organized by the London Organising Committee for the Olympic Games (LOCOG).
Split into simpler sentences: Guo Jinlong, the Mayor of Beijing, handed over the Olympic flag to the Mayor of London, Boris Johnson. There was alsoa performance organized by the London Organising Committee for the Olympic Games (LOCOG).