sentences:  Further invasions of Banu Hilal and Banu Sulaym Arab tribes into Tuareg regions in the 11th century moved the Tuareg southward into seven clans, which the oral tradition of Tuaregs claims to be descendants of the same mother.Each Tuareg clan ("tawshet") is made up of family groups constituting a tribe, each led by its chief, the "amghar".A series of "tawsheten" (plural of "tawshet") may bond together under an "Amenokal", forming a "Kel" clan confederation.