user: Question: What is the highest rank of a nation with fewer than 0 silver medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Cuba', 25.0, 18.0, 5.0, 48.0]
SQL:

assistant: SELECT MAX("Rank") FROM "Table" WHERE "Silver" < 0.0;