sentence: Six people in helmets race on dirt bikes around a circular, paved track surrounded by grass, game tents and onlookers. sentence:   The people start the race behind a closed and grated fence, which then opens and allows them to start racing from an elevated platform down onto the paved raceway. sentence:   The racers pedal with one person in a white jacket in the lead. sentence:   The race ends with the same person in the white jacket remaining in the lead until they approach the end of the track and an orange, white striped cone.