Complex sentence: As KSWS became a sole NBC affiliate in the mid-to-late 1960s, economic problems were emerging in southeastern New Mexico as the potash mines near Carlsbad downscaled activity or closed, and the Walker Air Force Base at Roswell was deactivated in 1967.
Split into simpler sentences: As KSWS became a sole NBC affiliate in the mid-to-late 1960s, economic problems were emerging in southeastern New Mexico. The potash mines near Carlsbad downscaled activity or closed, and the Walker Air Force Base at Roswell was deactivated in 1967.