Complex sentence: In the mid- 1960s, the station was operated by Marvin Kosofsky, who hired Bob Smith (a.k.a. Wolfman Jack), who relocated from Del Rio, Texas, to run the station with a mostly R&B format.
Split into simpler sentences: In the mid- 1960s, the station was operated by Marvin Kosofsky. Kosofsky hired Bob Smith (a.k.a. Wolfman Jack), who relocated from Del Rio, Texas, to run the station with a mostly R&B format.