Complex sentence: By the 14th century O'Tuathail (O'Toole) (of the Uí Dunlainge) had taken the lordship of of Uí Máil, having been in their turn been expelled from south Kildare by Norman incomers.
Split into simpler sentences: By the 14th century O'Tuathail (O'Toole) (of the Uí Dunlainge) had teken the lordship of of Uí Máil. They having been in their turn been expelled from south Kildare by Norman incomers.