Complex sentence: Forming sometime after the 11th century CE, the Kel Ayr were one of the earlier Tuareg groups to arrive in the Aïr, helping to push out the Hausa, later to become identified with Gobir (the Gobirawa) and other states to the south.
Split into simpler sentences: Forming sometime after the 11th century CE, the Kel Ayr were one of the earlier Tuareg groups to arrive in the Aïr. They pushed out the Hausa, who later became identified with Gobir (the Gobirawa) and other states to the south.