Complex sentence: In January 1989 MER sold WPMI to Clear Channel Communications, now known to the public for its ownership of well over 1000 radio stations, however at the time lear Channel owned only a dozen radio stations.
Split into simpler sentences: In January 1989, MER sold WPMI to Clear Channel Communications, better known to the public for its extensive radio interests (well over 1000 radio stations). At the time, however, Clear Channel owned only a dozen radio stations.