Original sentence: Since July 27, 2009, all ties between WISN Radio and WISN-TV have broken, when Clear Channel began to carry news and weather content on their area stations from Channel 6, ending a longtime agreement dating back to the Clear Channel sale for Weather Watch 12 to provide forecast to the six stations in Clear Channel's Milwaukee cluster
Edited sentence: Since July 27, 2009, all ties between WISN Radio and WISN-TV were severed, when Clear Channel began to carry news and weather content on their area stations from (WITI (Channel 6), ending a longtime agreement dating back to the Clear Channel sale for Weather Watch 12 to provide forecast to the six stations in Clear Channel's Milwaukee cluster