user: Question: Which nation has a rank of 7?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['1', 'Soviet Union', '7', '5', 9.0, 21.0]
SQL:

assistant: SELECT "Nation" FROM "Table" WHERE "Rank" = '7';