Complex sentence: The first jingle package, completed with a cut, which sang "Pennine two-thirty-five, that's the sound goin' into your ear'oles!", was provided by Emison, the jingle arm of EMI Music.
Split into simpler sentences: The first jingle package, completed with a cut, sang "Pennine two-thirty-five, that's the sound goin' into your ear'oles!". It was provided by Emison, the jingle arm of EMI Music.