Complex sentence: Charles O. Bick (1909-1994) was the first chairman of the Metropolitan Toronto Board of Police Commissioners, the civilian body which oversaw the Metropolitan Toronto Police Force and coined the service's slogan "To Serve and Protect".
Split into simpler sentences: Charles O. Bick (1909-1994) was the first chairman of the Metropolitan Toronto Board of Police Commissioners, the civilian body which oversaw the Metropolitan Toronto Police Force. He coined the service's slogan "To Serve and Protect".