Complex sentence: The All Star Jazz Band first performed on "The Orson Welles Almanac" March 15,1944; its last performance was July 12,1944, on the penultimate show in the series.
Split into simpler sentences: The All Star Jazz Band first performed on "The Orson Welles Almanac" on March 15,1944. Its last performance was July 12,1944, on the penultimate show in the series.