Complex sentence: The long history of the Santals may be traced from the age of human migration that started from Africa.Lot of recent findings bring the theory that human from Africa had started to migrate eastward that is in Asia.
Split into simpler sentences: The long history of the Santals may be traced from the age of human migration that started from Africa. A lot of recent findings bring the theory that human from Africa had started to migrate eastward that is in Asia.