Complex sentence: Upon arriving in London, teams were told to head to Tower Bridge and search for the Pearly King and Queen who would give them their next clue: the Detour, which was a choice between About Face and Pancake Race.
Split into simpler sentences: Upon arriving in London, teams were told to head to Tower Bridge and search for the Pearly King and Queen who would give them their next clue. This clue was for the Detour, giving them the choice between About Face and Pancake Race.