Complex sentence: For many years, WKKL simulcast some hours of programming from Boston public radio station WBUR from 1992 until 1999, when the arrangement was ended due to WBUR's 1997 acquisition of the 1240 AM frequency in West Yarmouth, the signal of which heavily overlaps with WKKL.
Split into simpler sentences: For many years, WKKL simulcast some hours of programming from Boston public radio station WBUR from 1992. That relationship ended in 1999, due to WBUR's 1997 acquisition of the 1240 AM frequency in West Yarmouth, the signal of which heavily overlaps with WKKL.