Question: John Campbell, 5th Duke of Argyll retired to a castle located on the shore of what loch?
Sentence (from "John Campbell, 5th Duke of Argyll"): Field Marshal John Campbell, 5th Duke of Argyll (June 1723 – 24 May 1806), styled Marquess of Lorne from 1761 to 1770, was a Scottish soldier and nobleman.
Relevant evidence: No