Complex sentence: The LMA lasted until 2004 when Dubuque TV Limited Partnership sold KFXB to the Christian Television Network, making KFXA became the sole Fox outlet for Northeastern Iowa.
Split into simpler sentences: The LMA lasted until 2004 when Dubuque TV Limited Partnership sold KFXB to the Christian Television Network. When that was done, KFXA became the primary Fox outlet for Northeastern Iowa.