user: Question: When rank is 7 and silver is less than 0, what is the total gold?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'United States (USA)', 6.0, 2.0, 1.0, 9.0]
SQL:

assistant: SELECT SUM("Gold") FROM "Table" WHERE "Rank" = '7' AND "Silver" < 0.0;