user: Question: What is the sum of the gold medals of the nation with 4 silvers and more than 6 total medals?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Soviet Union', 8.0, 3.0, 5.0, 16.0]
SQL:

assistant: SELECT SUM("Gold") FROM "Table" WHERE "Silver" = 4.0 AND "Total" > 6.0;