Question: Repentance Tower was built in 1565, and served as a watchtower for what tower house that is located by the River Annan?
Sentence (from "Mahee Castle"): In 1923, H.C. Lawlor and the Belfast Natural History and Philosophical Society partly renovated the tower house to avoid further erosion and built a buttress wall to support the northwest corner of the tower.
Relevant evidence: No