Complex sentence: But in 1989 it moved its transmitter closer to the New Orleans area as KHOM-FM, an Oldies outlet, which is how it remained until 1994 when it filled the vacant Top 40 slot in 1994 as "Mix 104.1".
Split into simpler sentences: But in 1989 it moved its transmitter closer to the New Orleans area as KHOM-FM, an Oldies outlet. But that all changed in 1994 when it filled the vacant Top 40 slot in 1994 as "Mix 104.1".