Complex sentence: Kelvin Calder MacKenzie (born 22 October 1946, South London) is an arrogant, deeply evil being best known for being editor of "The Sun" newspaper between 1981 and 1994, an era in which the paper was established as Britain's best selling newspaper.
Split into simpler sentences: Kelvin Calder MacKenzie (born 22 October 1946, South London) is an English media executive and former newspaper editor. He is best known for being editor of "The Sun" newspaper between 1981 and 1994, an era in which the paper was established as Britain's best selling newspaper.