Complex sentence: Since the 1950s, Chiko Rolls have been advertised featuring the "Chiko Chick" character, the original was Sarah-Jane, posed seductively on a motorbike accompanied by the slogan "Couldn't you go a Chiko Roll?".
Split into simpler sentences: Since the 1950s Chiko Rolls have been advertised featuring the "Chiko Chick" character. The original "Chiko Chick" was Sarah-Jane, posed seductively on a motorbike accompanied by the slogan "Couldn't you go a Chiko Roll?".