Question: Dubhghall mac Suibhne was a prominent 13th-century noble, the Earl of Menteith also obtained Lochranza Castle, an L-plan tower house situated on a promontory in Lochranza, on the north of the Isle of Arran, in which country?
Sentence (from "Dubhghall mac Suibhne"): He was a son of Suibhne and was Lord of Knapdale.
Relevant evidence: No