Complex sentence: Upon arriving in Paris, teams board the train to Le Mans, and upon arrival, they had to direct to Circuit Bugatti and picked up the Roadblock clue: "The person who performs this task will need to fit into a tight space".
Split into simpler sentences: Upon arriving in Paris, teams boarded a train to Le Mans, and then made their way to Circuit Bugatti. At the circuit was the Roadblock, asking "The person who performs this task will need to fit into a tight space".