Complex sentence: Though ratings were good for WBBS, the 1985 announcement that WSNS was affiliating with the Spanish International Network (SIN) caused WBBS to end weekday programming at the end of 1985: the exception was on the weekends when it broadcast Spanish movies into 1986.
Split into simpler sentences: Though ratings were good for WBBS, the 1985 announcement that WSNS was affiliating with the Spanish International Network (SIN) caused WBBS to end weekday programming at the end of 1985. The exception was on the weekends when it broadcast Spanish movies into 1986.