Complex sentence: A middle-aged businessman who appears in various advertisements for shoddy products and services, including a karaoke bar, dieting, a hotel, a firm of injury lawyers, a private detective service, and a speaking clock service, which usually gives out inaccurate times.
Split into simpler sentences: A middle-aged businessman who appears in various advertisements for shoddy products and services, including a karaoke bar, dieting, a hotel, a firm of injury lawyers and a private detective service. Another business is a speaking clock service, which usually gives out inaccurate times.