Complex sentence: As his cortege proceeded along Andersontown Road, a car being driven by two British Army corporals entered the street and sped past two teams of stewards, who were attempting to direct traffic out of the procession's path.
Split into simpler sentences: As his cortege proceeded along Andersontown Road, a car being driven by two British Army corporals entered the street. It sped past two teams of stewards who were attempting to direct traffic out of the procession's path.