Complex sentence: WZZM's owners, Northstar Television, planned to buy WUHQ in 1991 and turn it into a satellite of WZZM, which would have created a strong combined signal with about 40% overlap.
Split into simpler sentences: WZZM's owners, Northstar Television, planned to buy WUHQ in 1991 and turn it into a satellite of WZZM. This would have created a strong combined signal with about 40% overlap.