Complex sentence: On October 19,2008 KWVE-FM of San Clemente, California was scheduled to conduct a Required Weekly Test; however, it conducted a Required Monthly Test by mistake, causing all stations and cable systems in the immediate area to relay the test.
Split into simpler sentences: On October 19,2008, KWVE-FM in San Clemente, California was scheduled to conduct a Required Weekly Test. However, it conducted a Required Monthly Test by mistake, causing all stations and cable systems in the immediate area to relay the test.