Complex sentence: A tower house at Threecastles in Blessington parish, three kilometres west of Kilbride controls a fording point across the River Liffey and may have been constructed by the eighth Earl of Kildare before 1514 to protect his recently acquired territories against the O'Tooles.
Split into simpler sentences: A tower house at Threecastles in Blessington parish, three kilometres west of Kilbride village, controls a fording point across the River Liffey. It may have been constructed by the eighth Earl of Kildare before 1514 to protect his recently acquired territories against the O'Tooles.