Complex sentence: It is owned by Boston University, which owns Boston's flagship NPR station, WBUR; however, it is the process of being sold to Rhode Island Public Radio, a local group that originally helped bring a local NPR station to Rhode Island.
Split into simpler sentences: It is owned by Boston University, which owns Boston's flagship NPR station, WBUR. However, it is the process of being sold to Rhode Island Public Radio, a local group that originally helped bring a local NPR station to Rhode Island.