Complex sentence: A large number of known carcinogens are found in cigarette smoke, potent carcinogens found in cigarette smoke include polycyclic aromatic hydrocarbons (PAH, such as benzo (a) pyrene), Benzene, and Nitrosamine.
Split into simpler sentences: A large number of known carcinogens are found in cigarette smoke. Potent carcinogens found in cigarette smoke include polycyclic aromatic hydrocarbons (PAH, such as benzo (a) pyrene), Benzene, and Nitrosamine.