user: Question: What is the maximum rank of the nation that won 4 gold medals?
Columns: ['Rank', 'Athlete', 'Nation', 'Olympics', 'Gold', 'Silver', 'Bronze', 'Total(min. 2 medals)']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Al Oerter Category:Articles with hCards', 'United States (USA)', '1956–1968', 4.0, 0.0, 0.0, 4.0]
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Gold" = 4.0;