Complex sentence: An advertising campaign for the gums that ran for three years from 1958 to 1961 included the slogan "Don't Forget The Fruit Gums, Mum" invented by the copywriter Roger Musgrave (1929-2007).
Split into simpler sentences: An advertising campaign for the gums that ran for three years from 1958 to 1961 included the slogan "Don't Forget The Fruit Gums, Mum". The slogan was invented by the copywriter Roger Musgrave (1929-2007).