Complex sentence: KOAM-TV first signed on at 5:22 PM on December 13,1953 under the ownership of MidContinent Broadcasting Company, a joint venture of "The Joplin Globe" newspaper and KOAM radio (860 AM, the current KKOW).
Split into simpler sentences: KOAM-TV first signed on at 5:22 PM on December 13,1953. It was owned by the MidContinent Broadcasting Company, a joint venture of "The Joplin Globe" newspaper and KOAM radio (860 AM, now KKOW).