Original sentence: Its original purpose was a full-time signal to broadcast weather, sports, and other information, including things like school closings, as the AM station could not run before sunrise or after sunset , which in this part of the country can be as late as 7:45 AM — not good when school starts as early as 8:00.On August 20, 1963, KLWN-FM first signed on.The FM station was originally run by a tape, at that time the station's most popular programming was KU or Lawrence High football games
Edited sentence: On August 20, 1963, FM Radio came to Lawrence, Kansas, as KLWN-FM first signed on.The FM station  was originally run by a tape, and that no one listened until it was time for KU or Lawrence High Football.The main reason that it came on was to get a full-time signal to broadcast sports and other information, including things like school closings, as the AM station could not run before sunrise or after sunset, which in this part of the country can be as late as 7:45 AM — not good when school starts as early as 8:00