Complex sentence: The main cultural event of the year is Papua New Guinea's Independence Day, which is an event that is proceeded by a festival known as a Sing-Sing, encompassing many days of dancing, music, traditional ceremonies and alcohol consumption.
Split into simpler sentences: The main cultural event of the year is Papua New Guinea's Independence Day. The event is proceeded by a festival known as a "Sing-Sing", encompassing many days of dancing, music, traditional ceremonies and alcohol consumption.