Complex sentence: Alhassan Dantata (1877-August 17,1955) was a northern Nigerian kola nut trader and the richest man in West Africa at the time of his death.
Split into simpler sentences: Alhassan Dantata (1877-1955) was a wealthy northern Nigerian kola nut trader. By one estimate, he was the richest man in West Africa at the time of his death.