Complex sentence: It is sung at the Chicago World's Fair by a group of supposedly African natives, who chant in an African dialect before breaking into modern English, and singing about how glad they are to return to their apartments after the day's performance.
Split into simpler sentences: It is sung at the Chicago World's Fair by a group of supposedly African natives. They chant in an African dialect before breaking into modern English, singing about how glad they are to return to their apartments after the day's performance.