Complex sentence: Contains material that is considered unsuitable for exhibition by people under 15, who may only legally purchase, rent, exhibit or view MA15 + rated content under the supervision or accompany of an adult guardian.
Split into simpler sentences: Contains material that is considered unsuitable for exhibition by persons under the age of 15. People under 15 may only legally purchase, rent, exhibit or view MA15 + rated content under the supervision or accompany of an adult guardian.