user: Question: How much Total has a Silver smaller than 0?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Bulgaria', 19.0, 13.0, 9.0, 41.0]
SQL:

assistant: SELECT SUM("Total") FROM "Table" WHERE "Silver" < 0.0;