user: Question: What is the court rank of the person with a courtesy title of Nagato-no-kami?
Columns: ['Name', 'Tenure', 'Courtesy title', 'Court Rank', 'revenues']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Kuze Shigeyuki ( 久世重之 ? )', '1705–1720', 'Yamato-no-kami', 'Lower 4th (従四位下)', '50,000 koku']
SQL:

assistant: SELECT "Court Rank" FROM "Table" WHERE "Courtesy title" = 'Nagato-no-kami';