user: Question: Tell me the sum of gold for bronze less than 0
Columns: ['Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Russia', 5.0, 6.0, 2.0, 13.0]
SQL:

assistant: SELECT SUM("Gold") FROM "Table" WHERE "Bronze" < 0.0;