Complex sentence: In 1975, Avco announced the sale of its broadcasting outlets, and WLWC was sold in April 1976 to the Providence, Rhode Island-based Outlet Company, who changed the station's call letters to the current WCMH-TV.
Split into simpler sentences: In 1975, Avco announced the sale of its broadcasting outlets. Channel 4 was sold in April 1976 to the Providence, Rhode Island-based Outlet Company, who changed the station's call letters to the current WCMH-TV.