Original sentence: ) By 1958 the show was carried by 125 ABC affiliates, but it never won its time slot, competing with such heavyweights as The Perry Como Show on NBC and The Honeymooners, Perry Mason, and in 1960, the top-rated Gunsmoke on CBS
Edited sentence: ) By 1958 the show was carried by 125 ABC affiliates, but it never won its time slot, competing with such heavyweights as The Perry Como Show on NBC; and on CBS, The Honeymooners, Perry Mason, and in 1960, the top-rated Gunsmoke