user: Question: What was the highest number of gold medals when there were 0 silver medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Soviet Union', 7.0, 6.0, 3.0, 16.0]
SQL:

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