Complex sentence: The station has served as the CBS affiliate for the Wichita Falls-Lawton television market since its inception; although in the mid- 1950s, the station also carried DuMont programs and during the late 1950s, the station was briefly affiliated with the NTA Film Network.
Split into simpler sentences: The station has served as the CBS affiliate for the Wichita Falls-Lawton television market since its inception. During the late 1950s, the station was also briefly affiliated with the NTA Film Network.