Awon keta ipele je awon ero orin ngun elevators nigba ti etanje bouncing omi.. 
Ní ọdún 1962, wọ́n yàn án gẹ́gẹ́ bí olùkọ́ nílẹ ẹ̀kọ́  Institute of African Studies ti Obafemi Awolowo University.. 