Please improve the logic of this paragraph.
In 1972, Taft sold the WBRC radio stations, which changed their call letters to WERC-AM and FM. WBRC had become one of ABC's strongest affiliates, a position WBRC retained for the next quarter-century.
In 1972, Taft sold the WBRC radio stations, which changed their call letters to WERC-AM and FM. Meanwhile, WBRC-TV had become one of ABC's strongest affiliates, a position it retained for the next quarter-century.