Complex sentence: During the 15th century, Crossmolina passed into Bourke hands but in 1526 O'Donnell of Tirconnell (present day Co. Donegal) marched into Tirawley and demolished Crossmolina castle.
Split into simpler sentences: During the 15th century, Crossmolina passed into Bourke Family. In 1526 O'Donnell of Tir Connaill (Co. Donegal) invaded Tirawley and demolished Crossmolina castle.